Agilent 6814B Users Guide

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User's Guide

AC Power Solutions

HP Models 6814B, 6834B, and 6843A

For instruments with Serial Numbers:

HP 6814B: 3601A-00101 through 00270

US36010101-up

HP 6834B: 3601A-00101 through 00140

US36010101-up

HP 6843A: 3540A-00101 through 00140

US35400101-up

HP Part No. 5962-0887 Printed in U.S.A. Microfiche No 5962-0888 December, 1998

Warranty Information

CERTIFICATION

Hewlett-Packard Company certifies that this product met its published specifications at time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration facilities of other International Standards Organization members.

WARRANTY

This Hewlett-Packard hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery. HP software and firmware products, which are designated by HP for use with a hardware product and when properly installed on that hardware product, are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery. During the warranty period Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective. HP does not warrant that the operation for the software firmware, or hardware shall be uninterrupted or error free.

For warranty service, with the exception of warranty options, this product must be returned to a service facility designated by HP. Customer shall prepay shipping charges by (and shall pay all duty and taxes) for products returned to HP for warranty service. Except for products returned to Customer from another country, HP shall pay for return of products to Customer.

Warranty services outside the country of initial purchase are included in HP's product price, only if Customer pays HP international prices (defined as destination local currency price, or U.S. or Geneva Export price).

If HP is unable, within a reasonable time to repair or replace any product to condition as warranted, the Customer shall be entitled to a refund of the purchase price upon return of the product to HP.

LIMITATION OF WARRANTY

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer, Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation and maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

EXCLUSIVE REMEDIES

THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

ASSISTANCE

The above statements apply only to the standard product warranty. Warranty options, extended support contacts, product maintenance agreements and customer assistance agreements are also available. Contact your nearest Hewlett-Packard Sales and Service office for further information on HP's full line of Support Programs.

Safety Summary

The following general safety precautions must be observed during all phases of operation of this instrument.

Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety

standards of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no

liability for the customer's failure to comply with these requirements.

WARNING: LETHAL VOLTAGES

Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied.

GENERAL

This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions.

Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.

ENVIRONMENTAL CONDITONS

This instrument is intended for indoor use in an installation category III, pollution degree 2 environment. It is designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range.

BEFORE APPLYING POWER

Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety precautions are taken. Note the instrument's external markings described under "Safety Symbols".

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective (grounding) conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury.

ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l'appareil. Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.

FUSES

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes.

DO NOT REMOVE THE INSTRUMENT COVER

Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made only by qualified service personnel.

DO NOT EXCEED INPUT RATINGS

Operation at line voltages or frequencies in excess of those stated on the line rating label may cause leakage currents in excess of 5.0 mA peak.

Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel.

SAFETY SYMBOLS

Direct current

Alternating current Both direct and alternating current Three-phase alternating current

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal is at earth potential. Used for measurement and control circuits designed to be operated with one terminal at earth potential.

Terminal for Neutral conductor on permanently installed equipment

Terminal for Line conductor on permanently installed equipment

WARNING

Caution

On (supply)

Off (supply)

Standby (supply). Units with this symbol are not completely disconnected from ac mains when this switch is off. To completely disconnect the unit from ac mains, either disconnect the power cord or have a qualified electrician install an external switch.

In position of a bi-stable push control

Out position of a bi-stable push control Caution, risk of electric shock

Caution, hot surface

Caution (refer to accompanying documents)

The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

Declaration Page

Manufacturer's Name: Hewlett-Packard Company Manufacturer's Address: 150 Green Pond Road

declares that the Product

Product Name: a) AC Power Source/Analyzer

Model Number(s): a) HP 6814A, 6814B, 6834A, 6834B

conforms to the following Product Specifications:

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Rockaway, New Jersey 07866 U.S.A.

b) Harmonic/Flicker Test System

b) HP 6843A

Safety: IEC 1010-1:1990+A1(1992) / EN 61010-1:1993

EMC: CISPR 11:1990 / EN 55011:1991 - Group 1 Class A

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

New Jersey January 1997 __ __ Location Date Bruce Krueger / Quality Manager

European Contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:+49-7031-14-3143)

IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines 1 kV Power Lines

Acoustic Noise Information

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenläminformationsverordnung vom 18 Januar 1991.

* Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz * Normaler Betrieb * Nach EN 27779 (Typprüfung).

Manufacturer's Declaration

This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991.

* Sound Pressure Lp <70 dB(A) * At Operator Position * Normal Operation * According to EN 27779 (Type Test).

Printing History

The edition and current revision of this manual are indicated below. Reprints of this manual containing minor corrections and updates may have the same printing date. Revised editions are identified by a new printing date. A revised edition incorporates all new or corrected material since the previous printing date.

Changes to the manual occurring between revisions are covered by change sheets shipped with the manual. In some cases, the manual change applies only to specific instruments. Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments.

This document contains proprietary information protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated into another language without the prior consent of Hewlett-Packard Company. The information contained in this document is subject to change without notice.

Edition 2 ________December, 1998

Warranty Information 2 Safety Summary 3 Declaration Page 5 Acoustic Noise Information 6 Printing History 6 Table of Contents 7

1. GENERAL INFORMATION 9

Document Orientation 9 Safety Considerations 10 Options, Accessories, and User Replaceable Parts 10 Description 11

Capabilities 11

Front Panel/Remote Operation 12 Output Characteristic 12

Ranges 12 Output VA Capability 13

2. INSTALLATION 15

Inspection 15

Damage 15 Packaging Material 15 Items Supplied 15 Cleaning 15

Location 16

Bench Operation 16 Rack Mounting 16

Input Connections 17

Input Source and Line Fuse 17 Installing the Power Cord 17

Output Connections 18 Wire Considerations 19

Voltage Drops 19

Remote Sense Connections 20

OVP Considerations 21 Output Rating 21

Trigger Connections 21 Digital Connections 21 Controller Connections 22

HP-IB Connector 22 RS-232 Interface 23

3. TURN-ON CHECKOUT 27

Introduction 27 Preliminary Checkout 27 Using the Keypad 28 Checkout Procedure 28 In Case of Trouble 31

Error Messages 31

Line Fuse 31

4. FRONT PANEL OPERATION 33

Introduction 33 Front Panel Description 33 System Keys 35 Function Keys 36

Immediate Action Keys 36 Scrolling Keys 37 Meter Display Keys 37 Output Control Keys 38 Protection and Status Control Keys 40 Trigger and List Control Keys 41

Entry Keys 42 Examples of Front Panel Programming 43

1 - Setting the Output Voltage Amplitude 43 Procedure for Three-Phase AC Sources 44 2 - Setting the Output Frequency 45 3 - Setting a Protection Feature 45 4 - Using Transient Voltage Modes 46 5 - Trigger Delays and Phase Synchronization 49 6 - Using Slew Rates to Generate Waveforms 52 7 - Measuring Peak Inrush Current 54 8 - Setting the HP-IB Address and RS-232 Parameters 55 9 - Saving and Recalling Operating States 55 10 - Switching Between Single- and Three-phase Operation (HP 6834B only) 56

A. SPECIFICATIONS 57

Specifications 57 Supplemental Characteristics 58

B. VERIFICATION AND CALIBRATION 61

Introduction 61

Equipment Required 61 Test Setup 62

Performing the Verification Tests 62

Turn-On Checkout Procedure 62 Voltage Programming and Measurement Accuracy 63 RMS Current Readback Accuracy 63

Performing the Calibration Procedure 64

Front Panel Calibration Menu 65

Front Panel Calibration 65

Enable Calibration Mode 65 Calibrating and Entering Voltage Calibration Values 66 Calibrating and Entering Current Calibration Values 67 Calibrating the Output Impedance (HP 6843A only) 68 Saving the Calibration Constants 68

Changing the Calibration Password 69 Calibration Error Messages 69 Calibration Over the HP-IB 69

HP Calibration Program Listing 69

C. ERROR MESSAGES 73

Error Number List 73

INDEX 77

General Information

Document Orientation

This manual describes the operation of the HP 6814B/6834B/6843A AC Power Solutions. These units will be referred to as "ac sources" throughout this manual. Operation of the HP 6843A is described for normal mode operation only. The following documents are shipped with your ac source:

♦ a Quick-Start Guide, to help you quickly get started using the ac source ♦ a User's Guide, containing detailed installation, checkout, and front panel information ♦ a Programming Guide, containing detailed HP-IB programming information ♦ a Quick Reference Card, designed as a memory jogger for the experienced user ♦ Regulatory Test Solution User's Guides are shipped with HP 6843A units only

You will find information on the following tasks in these guides. Refer to the table of contents of each guide for a complete list of the topics.

Topic Location

Accessories and options Chapter 1 - this guide Calibrating the ac source Appendix B - this guide Front panel keys Chapter 4 - this guide Front panel programming examples Chapter 4 - this guide Line voltage connections Chapter 2 - this guide Line voltage ratings Appendix A - this guide Operator replaceable parts Chapter 1 - this guide Operator troubleshooting Chapter 3 - this guide Operating characteristics Appendix A - this guide Performance specifications Appendix A - this guide Quick operating checkout Chapter 3 - this guide Rack mounting Chapter 2 - this guide RS-232 operation Chapter 2 - this guide SCPI programming examples Chapter 3 - Programming Guide SCPI programming commands Chapter 4 - Programming Guide Turn-on/checkout Chapter 3 - this guide Wiring - discrete fault indicator (DFI) Chapter 2 - this guide

- HP-IB controller Chapter 2 - this guide

- load or loads Chapter 2 - this guide

- voltage sensing (local and remote) Chapter 2 - this guide

- remote inhibit (RI) Chapter 2 - this guide

1 - General Information

Safety Considerations

This ac source is a Safety Class 1 instrument, which means it has a protective earth terminal. That terminal must be connected to earth ground through a power source equipped with a ground receptacle. Refer to the Safety Summary page at the beginning of this guide for general safety information. Before installation or operation, check the ac source and review this guide for safety warnings and instructions. Safety warnings for specific procedures are located at appropriate places in the guide.

Options, Accessories, and User Replaceable Parts

Table 1-1. Options

Option Description

400 Input power 360-440 Vac, three-phase, 47-63 Hz 1CM 2- Rack mount kit (HP 5062-3977)

Support rails (HP 5064-0001) are required (rails are not included in rack mount kit).

Table 1-2. Accessories

Item HP Part Number

Fuse replacement kits 30A for 180-235 Vac, 3-phase line HP-IB cables

0.5 meters (1.6 ft)

1.0 meter (3.3 ft)

2.0 meters (6.6 ft)

3.0 meters (13.2 ft)

Heavy duty slide mount kit

5060-3513

10833D 10833A 10833B 10833C

5063-2310

Table 1-3. User Replaceable Parts List

Description HP Part No.

Rack mount kit See “Options” Slide mount kit See “Accessories” 7-terminal sense connector plug 1252-3698 Sense connector cover 4040-2268 4-terminal digital connector plug 1252-1488 AC input safety cover (with strain relief and brushing) 5001-9837

Screw (4), ac input safety cover (6-32 x 1.5in) 2360-0405 Screw (8), ac input barrier block (8-32 x 5/16in) N/A

AC output safety cover 5001-9811

Screw (2), ac output safety cover (6-32 x .3in) 2460-0012 Screw (8), ac output barrier block (10-32 x .37in) N/A

Fuse safety cover 5001-9810

Screw (2), fuse safety cover (6-32 x .3in) 2460-0012 User’s Guide (this manual) 5962-0887 Programming Guide 5962-0889 Quick Start Guide 5962-0883 Quick Reference Card 5962-0885 Appropriate HP Regulatory Test Solution Software HP 14761A, HP 14762A, HP 14763A

General Information - 1

Description

The ac source combines three instruments in one unit as shown in the following figure. The function generator produces waveforms with programmable amplitude, frequency, and shape. The power amplifier amplifies the function generator signal to produce the ac power for your application. The measurement functions range from a simple readback of rms voltage and current, to sophisticated capabilities such as waveform analysis.

DAC

WAVEFORM

GENERATOR

SOURCE

BIPOLAR

AMPLIFIER

shunt

MEASUREMENT

BLOCK

POWERMETER FFT ANALYZER

Figure 1-1. AC Source Functional Elements

The following model ac power sources are described in this User's Guide:

Model Description

HP 6814B 3000 VA single –phase operation HP 6834B 1500 VA/ phase for three-phase operation

(4500 VA for single-phase operation)

HP 6843A 4500 VA single-phase operation

Capabilities

♦ Programmable ac voltage, dc voltage, frequency, phase, and current limit. ♦ Sine, square, clipped sine, and user-definable waveforms. ♦ Voltage and frequency slew control. ♦ Synthesized waveform generation for high resolution and accuracy in frequency, low waveform

distortion, and glitch-free phase transitions.

♦ Step and pulse output transients for generating surge, sag, dropout, and other line disturbance

simulations.

♦ Nonvolatile list programming for generating complex output transients or test sequences. ♦ Three-phase/single-phase output capability (HP 6834B only) ♦ Extensive measurement capability:

• Ac rms, dc, ac+dc voltage and current and peak current.

• Real, reactive, and apparent power.

• Harmonic analysis of voltage and current waveforms gives amplitude, phase, and total

harmonic distortion results up to the 50th harmonic.

• Triggered acquisition of digitized voltage and current with extensive post-acquisition

calculations.

• Additional total power and neutral curent measurementts in the three-phase model.

• All measurements made with 16-bit resolution.

♦ Trigger In and Trigger Out for synchronizing transient events or measurements with external

signals.

♦ Front panel control with 14-character vacuum flourescent display, keypad, and rotary pulse

generators for voltage and frequency settings.

♦ Built-in HP-IB and RS-232 interface programming with SCPI command language.

1 - General Information

♦ Nonvolatile state and waveform storage and recall. ♦ Over-voltage, over-power, over-current, over-temperature, and RI/DFI protection features. ♦ Built-in output and sense disconnect relays. ♦ Extensive selftest, status reporting, and software calibration.

Front Panel/Remote Operation

The front panel has both rotary (RPG) and keypad controls for setting the output voltage and frequency. The panel display provides digital readouts of a number of output measurements. Annunciators display the operating status of the ac source. System keys let you perform system functions such as setting the HP-IB address and recalling operating states. Front panel Function keys access the ac source function menus. Front panel Entry keys let you select and enter parameter values. Refer to chapter 4 for a complete description of the front panel controls.

Remotely programming is accomplished from either the HP-IB bus or from an RS-232 serial port. HP-IB and RS-232 programming uses SCPI commands (Standard Commands for Programmable Instruments) that make the ac source programs compatible with those of other instruments. AC source status registers permit remote monitoring of a wide variety of ac source operating conditions

NOTE: Refer to the ac source Programming Guide for further information about remotely

programming the ac source. If you are using the HP 6843A, refer to the appropriate Regulatory Test Solution User’s Guide for information about regulatory testing.

Output Characteristic

Ranges

The ac source’s output characteristic is shown in the following figure. The output voltage of the ac source may be adjusted to any value within the range of the unit. On three-phase units, each phase can be adjusted independently of the other two.

Rated output VA and conversion efficiency is greatest when the output voltage is set near maximum. For this reason, the ac source is designed to operate on one of two ranges: 150 volts full-scale, or 300 volts fullscale. You should choose the range that allows you to operate nearest the full-scale output capability of the selected range.

Vrms

300 V

150 V

General Information - 1

See Figure 1-3

5A 10A (6834B 3phase) 15A 30A (6834B 1phase) 10A 20A (6814B) 16A 32A (6843A)

Irms

Figure 1-2. AC Source Output Characteristic (in real-time mode)

Output VA Capability

The output capability of each output phase is limited by VA (volts-amps) rather than power (watts). The amount of VA available to a load can be determined by examining figure 1-3, the output power curve. This curve rates the available VA versus output voltage. Full VA is available only at a full-scale voltage. Full current is available at voltages between 50% and 100% of the output voltage range. Appendix A documents the ac source's specifications and supplemental characteristics.

NOTE: The load on the ac source may draw full VA at any power factor between 0 and 1, and

may draw maximum current with a crest factor of 4 (3 for HP 6843A). If the load draws current in excess of the maximum rated rms or peak current, the voltage amplitude will be clipped to prevent excessive internal power dissipation.

100

OUTPUT VA, PERCENT OF MAXIMUM

OUTPUT VOLTAGE, PERCENT OF RANGE

Figure 1-3. AC Source VA Capabilities

70 80 90 10010 20 30 40 50 60

Installation

Inspection

Damage

When you receive your ac source, inspect it for any obvious damage that may have occurred during shipment. If there is damage, notify the shipping carrier and the nearest HP Sales and Support Office immediately. The list of HP Sales and Support Offices is at the back of this guide. Warranty information is printed in the front of this guide.

Packaging Material

Until you have checked out the ac source, save the shipping carton and packing materials in case the unit has to be returned. If you return the ac source for service, attach a tag identifying the model number and the owner. Also include a brief description of the problem.

Items Supplied

Check that the following items are included with your ac source. Some items are installed in the unit.

Power Cord

Sense/Digital connector

Safety covers

Manuals

Change page

A power cord appropriate for your location. The cord may or may not be terminated in a power plug (see "Options" in chapter 1). If the cord is not included, contact your nearest HP Sales and Support Office (refer to the list at the back of this guide).

a 4-terminal digital plug that connects to the back of the unit. a 7-terminal sense plug that connects to the back of the unit.

Ac input cover with strain relief Ac output cover Fuse cover

User’s Guide Programming Guide Quick Start Guide Quick Reference Card Regulatory Test Solutions Guides (supplied with HP 6843A units)

If applicable, change sheets may be included with this guide. If there are change sheets, make the indicated corrections in this guide.

Cleaning

Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.

WARNING: To prevent electric shock, unplug the unit before cleaning.

2 - Installation

Location

Refer to the Safety Summary page at the beginning of this manual for safety-related information about environmental conditions.

WARNING: HP 6814B units weigh 79.5 kg (175 lbs.)

HP 6834B/ 6843A units weigh 87.7 kg (193 lbs.) Obtain adequate help when moving the unit or mounting the unit in the rack.

Bench Operation

The outline diagram in figure 2-1 gives the dimensions of your ac source. The feet may be removed for rack mounting. Your ac source must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do

not block the fan exhaust at the rear of the unit.

Rack Mounting

The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack mounting kits are available as Option 1CM or 1CP. Installation instructions are included with each rack mounting kit

CAUTION: HP 6814B/ 6834B/ 6843A units require instrument support rails for non-stationary

installations. These are normally ordered with the cabinet and are not included with the rack mounting kits.

TOP

574.7mm

22.6"

425.5mm

16.75"

REAR

12.7mm

0.5"

262.6mm

10.3"

19.1mm

0.8" SIDE

266.7mm

10.5"

Figure 2-1. Outline Diagram

Installation - 2

Input Connections

Input Source and Line Fuse

The ac source requires a 3-phase power service that provides 7350 VA (6000 W) maximum. The power service should have a current rating greater than or equal to the ac source's circuit breaker rating. The ac source has a delta input (no neutral connection) and will accept power from either delta (triangle) or wye (star) services.

CAUTION: Two input voltage ranges are available (see "AC Input Ratings" in appendix A). The ac

source will be damaged if it is operated at an input voltage that is outside of its configured input range.

In order to maintain phase current balancing, the power service should be a dedicated line with only HP 6814B/6834B/6843A ac sources drawing current from it. A disconnect box located near the ac source is

recommended for all installations and is mandatory for direct-wired installations.

Installing the Power Cord

WARNING: Installation of the power cord must be done by a qualified and licensed electrician and

must be in accordance with local electrical codes.

The power cords supplied with the ac source do not include a power plug. Terminating connectors and a ground lug are attached to one end of the cord. See Figure 2-2 while performing the following procedure.

1. Check the line fuses as follows:

a. Examine the FUSES label on the rear panel. b. Remove the safety cover in front of the fuse caps. c. Unscrew the line fuse caps from the rear panel and verify that all fuses are as

specified on the label. Reinstall the fuses.

d. Reinstall the safety cover in front of the fuse caps.

2. Remove the ac input cover from the back of the unit.

3. Open the line clamp on the ac input cover and insert the line cord through the opening.

4. Position the power cord so that the clamp is near the end of the outside insulating sheath on the power cord. Tighten the screws to secure the clamp.

5. Secure the three ac lines to the ac power strip as follows:

Phase 1 to L1 (black). Phase 2 to L2 (red). Phase 3 to L3 (orange).

6. Secure the ground wire (green) to the chassis earth ground terminal.

7. Slip the safety cover over the ac input terminal strip and secure the cover with the four screws.

8. If required, wire the appropriate power plug to the other end of the power cord. For usermade cables, strip back the sheath 10 cm (4 in).

2 - Installation

CAUTION

LINE RATING

WARNING

F 1

F 2 F 3

WARNING

L 2 L 3

L 1

10cm (4 in.)

Figure 2-2. Connecting the Power Cord

Output Connections

The power output terminal block has a termination for each of the output phases (φ1, φ2, φ3 ) and a floating neutral line (COM) for the phase return connections. A separate earth ground terminal (⊥) is located near the output terminals.

These screw terminals are internally connected in single-phase mode only (when NOUPUTS = 1)

HP 6834B HP 6814B / 6843A

These screw terminals

φ 2

are internally connected on HP 6843A units

COM

These screw terminals are internally connected on HP 6814B units

⊥

Figure 2-3. Output Connections

COM

⊥

Installation - 2

NOTE: To minimize the possibility of instability on the output, keep load leads as short as possible

bundle or twist the leads tightly together to minimize inductance

Wire Considerations

Current Ratings

Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat when

carrying the maximum short-circuit current of the ac source. If there is more than one load, then any pair of load wires must be capable of safely carrying the full-rated current of the ac source.

Table 2-1 lists the characteristics of AWG (American Wire Gage) copper wire.

Table 2-1. Ampacity and Resistance of Stranded Copper Conductors

AWG No. Ampacity

14 25 0.0103 6 80 0.0016 12 30 0.0065 4 105 0.0010 10 40 0.0041 2 140 0.00064

8 60 0.0025 1/0 195 0.00040

1. Ampacity is based on 30°C ambient temperature with conductor rated at 60°C. For ambient temperature other than 30°C, multiply the above ampacities by the following constants:

Temp. (°C)

21-25 1.08 41-45 0.71 26-30 1.00 46-50 0.58 31-35 0.91 51-55 0.41 36-40 0.82

2. Resistance is nominal at 75 °C wire temperature.

Resistance

(Ω/m)

Constant

NOTES:

AWG No. Ampacity

Temp. (°C) Temp. (°C)

Resistance

(Ω/m)

Voltage Drops

The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the wires. In general, if the wires are heavy enough to carry the maximum short circuit current without overheating, excessive voltage drops will not be a problem. The voltage drops across the load wires should be limited to less than 2% of the output voltage.

Refer to Table 2-1 if you need to calculate the voltage drop for some commonly used AWG copper wire.

2 - Installation

Remote Sense Connections

Under normal operation, the ac source senses the output voltage at the output terminals on the back of the unit. External sense terminals are available on the back of the unit that allow the output voltages to be sensed at the load, compensating for impedance losses in the load wiring. As shown in the following figure:

♦ Connect the phase 1 (φ1) through phase 2 (φ) sense terminals to the side of the load that connects

to the corresponding output terminal.

♦ Connect the Neutral (COM) sense terminal connector to the neutral side of the load. ♦ Twist and shield all signal wires to and from the sense connectors.

The sense leads are part of the ac source's feedback path and must be kept at a low resistance in order to maintain optimal performance. Connect the sense leads carefully so that they do not become open-circuited. If the sense leads are left unconnected or become open during operation, the ac source will regulate at the output terminals, resulting in a 3% to 5% increase in output over the programmed value.

Set the ALC command to EXT (external) to enable remote sensing. The ALC command is located under the Voltage key as explained in chapter 4. Set the ALC command to INT (internal) to disable remote sensing.

NOTE: Phase 2 and phase 3

connections are not available on HP 6814B/6843A units.

φ 2

COM

⊥

COM φ 3 φ 2 φ 1

1 LOAD

φ 2

LOAD

3 LOAD

Figure 2-4. Remote Sense Connections

Installation - 2

OVP Considerations

The overvoltage protection circuit senses voltage near the output terminals, not at the load. Therefore the signal sensed by the OVP circuit can be significantly higher than the actual voltage at the load. When using remote sensing, you must program the OVP trip voltage high enough to compensate for the voltage drop between the output terminals and the load.

Output Rating

In remote sense applications, the voltage drop in the load leads subtracts from the available load voltage (see "Remote Sensing Capability" in appendix A). As the ac source increases its output to overcome this voltage drop, the sum of the programmed voltage and the load-lead drop may exceed the ac source's maximum voltage rating. This will not damage the unit, but may trip the OV protection circuit, which senses the voltage at the output terminals.

Trigger Connections

The BNC trigger connectors on the rear panel let you apply trigger signals to the ac source as well as generate trigger signals from the ac source. The electrical characteristics of the trigger connectors are described in appendix A. More information on programming external triggers is found in chapter 4 of the ac source Programming Guide.

Trigger IN Allows negative-going external trigger signals to trigger the ac source. Trigger OUT Generates a negative-going pulse when the selected transient output has occurred.

Digital Connections

This connector, which is on the rear panel, is for connecting the fault and the inhibit signals. The fault (FLT) signal is also referred to as the DFI signal in the front panel and SCPI commands. The inhibit (INH) signal is also referred to as the RI signal in the front panel and SCPI commands.

The connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the mating plug to make your wire connections. The electrical characteristics of the digital connectors are described in appendix A. More information on programming the digital connectors is found in chapter 4 of the ac source Programming Guide.

NOTE: It is good engineering practice to twist and shield all signal wires to and from the digital

connectors

The following examples show how you can connect the FLT/INH circuits of the ac source. In example A, the INH input connects to a switch that shorts pin + to pin ⊥ whenever it is necessary to

disable output of the unit. This activates the remote inhibit (RI) circuit, which turns off the ac output. The front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register. To reenable the unit, first open the connection between pins + and ⊥ and then clear the protection circuit. This can be done either from the front panel or over the HP-IB/RS-232.

2 - Installation

In example B, the FLT output of one unit is connected to the INH input of another unit. A fault condition in one of the units will disable all of them without intervention either by the controller or external circuitry. The controller can be made aware of the fault via a service request (SRQ) generated by the Questionable

FLT INH

. . . .

NOTE: Connectors

are removable

FLT INH

. . . .

FLT Output

INH Input

A) INH Example with One Unit

INH Common

Switch

(Normally

Open)

INH Input

FLT Output

B) FLT Example with Multiple Units

Status summary bit.

Figure 2-5. FLT/INH Examples

Controller Connections

The ac source connects to a controller either through an HP-IB or an RS-232 connector.

HP-IB Connector

Each ac source has its own HP-IB bus address. AC sources may be connected to the bus in series configuration, star configuration, or a combination of the two. You may connect from 1 to 15 ac sources to a controller HP-IB interface.

NOTE: The ac source is shipped from the factory with its HP-IB address set to 5. This address can

be changed as described in chapter 4 of this guide.

Installation - 2

RS-232 Interface

The ac source provides an RS-232 programming interface, which is activated by commands located under the front panel Address key. When the RS-232 interface is selected, the HP-IB interface is disabled.

NOTE: Sending or receiving data over the RS-232 interface when not configured for REMOTE

operation can cause unpredictable results. Always make sure the ac source is configured for remote operation when using the RS-232 interface.

Interface Commands

All SCPI commands are available through RS-232 programming. The SYSTem:LOCal, SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.

SYSTem:LOCal Places the ac source in local mode during RS-232 operation.The front panel keys

are functional.

SYSTem:REMote Places the ac source in remote mode during RS-232 operation. All front panel

keys except the Local key are disabled.

SYSTem:RWLock Places the ac source in remote mode during RS-232 operation. All front panel

keys including the Local key are disabled.

RS-232 Data Format

♦ constant 11-bit data format ♦ one start bit ♦ seven data bits plus a parity bit (even or odd parity), or eight data bits without parity

(parity bit is "0")

♦ two stop bits

You can specify one of the following baud rates: 300 600 1200 2400 4800 9600

NOTE: The ac source always uses one start bit and two stop bits regardless of the baud rate. The

number of start and stop bits is not programmable.

RS-232 Connector

The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or terminal with a properly configured DB-25 connector. You can use a standard HP 24542G or 24542H interface cable.

Table 2-2. RS-232 Connector

1 2 3 4 5

6 7 8 9

1 2 3 4 5 6 7 8 9

Input/Output

Output

Input Output Output

Common

Input

Output

Description

Reserved for service use Receive Data (RxD) Transmit Data (TxD) Data Terminal Ready (DTR) Signal ground Data Set Ready (DSR) no connection no connection Reserved for service use

2 - Installation

Hardware Handshake

The RS-232 interface uses the DTR (data terminal ready) line as a holdoff signal to the bus controller. When DTR is true, the bus controller may send data to the ac source. When DTR goes false, the bus controller must stop sending data within 10 characters, and must not send any more data until DTR goes true again. The ac source sets DTR false under two conditions.

1. When the input buffer is full (approximately 100 characters have been received), it will set DTR false. When enough characters have been removed to make space in the input buffer, DTR will be set to true, unless condition 2 (see below) prevents this.

2. When the ac source wants to "talk", which means that it has processed a query, and has seen a <newline> message terminator, it will set DTR false. This implies that once a query has been sent to the power source, the bus controller should read the response before attempting to send more data. It also means that a <newline> must terminate the command string. After the response has been output, the ac source will set DTR true again, unless condition #1 prevents this.

The ac source monitors the DSR (data set ready) line to determine when the bus controller is ready to accept data. It checks this line before each character is sent, and the output is suspended if DSR is false. When DSR goes true, transmission will resume. The ac source will leave DTR false while output is suspended. A form of deadlock exists until the bus controller asserts DSR true to allow the ac source to complete the transmission.

Control-C is the equivalent to the HP-IB device clear command. It clears the operation in progress and discards any pending output. For the control-C character to be recognized by the power source while it holds DTR false, the bus controller must first set DSR false.

Null modem RS-232 interface cables swap the DTR and DSR lines as shown in the following figure. For other bus controllers or languages, you must determine what form of hardware handshake is used. You may have to build a customized cable to connect the holdoff lines as necessary. If your bus controller does not use hardware handshaking, tie the DSR input to the ac source to a signal that is always true. This implies that your bus controller must always be ready to accept data. You may want to set the baud rate toeither 2400 or 4800 baud to ensure that this is true.

bus controller

TxD (3)

RxD (2) *DTR (4) *DSR (6)

Ground (5)

ac source

TxD (3)

RxD (2) DTR (4) DSR (6)

Ground (5)

Figure 2-7. Null Modem Interface Lines

Installation - 2

Response Data Terminator

All RS-232 response data sent by the ac source is terminated by the ASCII character pair <carriage return><newline>. This differs from HP-IB response data which is terminated by the single character <newline>.

Turn-On Checkout

Introduction

Successful tests in this chapter provide a high degree of confidence that the ac source is operating properly. For verification tests, see appendix B. Complete performance tests are given in the Service Guide.

NOTE: This chapter provides a preliminary introduction to the ac source front panel. See chapter

4 for more details.

Preliminary Checkout

WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH on

contact may result if the output terminals or circuits connected to the output are touched when power is applied.

1. If you have not already done so, connect the power cord to the ac source and plug it in.

2. Turn the front panel power switch to ON (1).

3. The ac source undergoes a self-test when you turn it on. The following items appear on the display:

a. A brief pattern that lights all display segments, followed by the model number and the software revision number.

b. The display then goes into the meter mode with the Dis annunciator on, and all others off. "Meter mode" means that the VOLTS digits indicate the output voltage and the FREQ digits indicate the output frequency. The voltage will be at or near zero and the frequency will be at 60 Hertz.

NOTE: If the ac source detects an error during self-test, the Err anunciator on the display will be

lit. Pressing the Shift and Error keys will show the error number. Go to "In Case of Trouble" at the end of this chapter.

4. Check that the ac source fan is on. You should be able to hear the fan and feel the air coming from the unit.

5. Press Output on/off once. The Dis annunciator will go off and the CV annunciator will go on.

6. Turn the unit off.

3 - Turn-On Checkout

Using the Keypad

(shift) Some of the front panel keys perform two functions, one labeled in black and

the other in blue. You access the blue function by first pressing the blue shift key. Release the key after you press it. The Shift annunciator will be on, indicating that you have access to any key's shifted function.

and These keys let you scroll up and down through the choices in the presently

and These keys let you select the previous or the next parameter for a specific

Enter

selected function menu. All menu lists are circular; you can return to the starting position by continuously pressing either key.

äã

command. If the command has a numeric range, these keys increment or decrement the existing value.

The backspace key is an erase key. If you make a mistake entering a digit and have not yet pressed Enter, you can delete the digit by pressing Å. Delete more digits by repeatedly pressing this key.

Executes the entered value or parameter of the presently accessed command. Until you press this key, the parameters you enter with the other keys are displayed but not entered into the ac source. After pressing Enter, the ac source returns to Meter mode in most cases. In Harmonic or List mode, the ac source displays the next point in the list.

Checkout Procedure

WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH on

contact may result if the output terminals or circuits connected to the output are touched when power is applied.

The output test requires that you connect light bulbs to the output of the unit and apply a potentially hazardous voltage of 120 Vac. Properly shield all connections and wires.

The test in this section checks for output voltage and current on the ac source by having you connect light bulbs to the output of the unit. The following equipment is recommended for performing this output checkout procedure:

♦ 1 - 100 W light bulb for HP 6814B/6843A; 3 - 100 W light bulbs for HP 6834B ♦ 1 - light bulb socket for HP 6814B/6843A; 3 - sockets for HP 6834B ♦ wires for connecting socket to the unit

NOTE: When the ac source is turned on as shipped from the factory, it asserts the *RST state.

You can subsequently program the unit to turn on according to the state stored in *RCL location 0, as explained in chapter 4. The following procedures assume that the unit turns on in the *RST state.

Turn-On Checkout - 3

Make sure that the unit is turned off, and make the following connections to the output. If you are verifying a single phase source, you only need to connect one bulb.

100 WATT

NOTE: Phase 2 and phase 3

connections are not available on HP 6814B/6843A units.

φ 2

COM

⊥

Figure 3-1.Verification Connections

Procedure Display Explanation

1. Turn the unit on. Meter mode

2. Press the Voltage key. VOLT 0.00 Display indicates the default settings.

3. Press Phase Select

VOLT 0.00 Single phase units use only phase 1.

until only φ1 is lit.

Meter mode is active and the Dis annunciator should be on.

If you are verifying a thre phase source, all phase annunciators should be on.

4. Press 1, 2, 0, Enter VOLT 120 Programs the output on phase 1 to 120 Vrms. After the

value is entered, the display returns to Meter mode, which indicates that no voltage is applied to the output.

5. Press Output On/Off 120 V 60 Hz Turns the output on and applies 120 volts to the phase

1 light bulb. The Dis annunciator should be off and CV should be on.

If you are verifying three phase sources, repeat steps 2 through 4 for phase 2 and phase 3. All three light bulbs should be lit when this action is complete.

Continue with step 6 of you are verifying thre phase sources. Otherwise skip to step #10.

6. Press the Voltage key. VOLT 120

7. Press Phase Select

until all phase annunciators are lit

8. Press 0, Enter VOLT 0 Turns off all light bulbs connected to the three-phase

9. Press Voltage 1, 2, 0,

Enter

10. Press Protect PROT:CLEAR Display accesses the protection menu list.

VOLT 120

source.

VOLT 120 Turns on all light bulbs connected to the three-phase

source.

3 - Turn-On Checkout

Procedure Display Explanation

11. Press • or ‚ and scroll

to the VOLT:PROT item

12. Press 1, 6, 0, Enter VOLT:PROT 160 Programs the OVP to 160 Vpeak, the rms value of

13. Press Protect, scroll to

the VOLT:PROT item, and press 3, 2, 0, Enter

14. Press Protect, and

Enter

15. Press Shift, and

Current

16. Press . 5 Enter CURR:LEV .5

VOLT:PROT 500 Display shows the overvoltage protection trip voltage

for your unit. The overvoltage protection voltage is programmed in peak, not rms volts.

which is less than the previously set rms voltage.

0 V 60 Hz Because the peak OVP voltage entered was less than

the rms output voltage, the OVP circuit tripped. The output dropped to zero, CV turned off, and Prot turned on.

VOLT:PROT 320 Programs the OVP to a peak value that is greater than

the rms output voltage value. Note: You cannot clear an OVP trip until you have first removed the cause of the condition.

120 V 60 Hz Executes the PROT:CLEAR command, restoring the

output. Prot turns off and CV turns on.

CURR:LEV 5 Indicates the default output current limit setting.

Sets the current limit to .5 amperes. The CC annunciator is on, indicating that the unit is in current limit mode and the light bulbs are dimmer because the output voltage has dropped in its attempt to limit output current.

17. Press Protect, scroll to

the CURR:PROT item, and press È to select ON. Then press Enter.

18. Press Output On/Off 0.5 V 60 Hz

19. Press Protect, scroll to

the CURR:PROT item, press È to select OFF, then press Enter.

20. Turn the unit off. The next time the unit turns on it will be restored to the

CURR:PROT ON You have enabled the overcurrent protection circuit.

The circuit then tripped because of the output short. The CC annunciator turns off and the OCP and Prot annuciators come on. The output current is near zero.

The output is off and the Dis annunciator turns on.

CURR:PROT OFF You have disabled the overcurrent protection circuit.

The Prot annunciator turns off.

*RST or factory default state

Turn-On Checkout - 3

In Case of Trouble

Error Messages

Ac source failure may occur during power-on selftest or during operation. In either case, the display may show an error message that indicates the reason for the failure.

Selftest Errors

Pressing the Shift and Error keys will show the error number. Selftest error messages appear as: ERROR <n>, where "n" is a number listed in the following table. If this occurs, turn the power off and then back on to see if the error persists. If the error message persists, the ac source requires service.

Table 3-1. Power-On Selftest Errors

Error No. Failed Test

Error 0 No error Error 1 Non-volatile RAM RD0 section checksum failed Error 2 Non-volatile RAM CONFIG section checksum failed Error 3 Non-volatile RAM CAL section checksum failed Error 4 Non-volatile RAM WAVEFORM section checksum failed Error 5 Non-volatile RAM STATE section checksum failed Error 6 Non-volatile RAM LIST section checksum failed Error 10 RAM selftest Error 11 to 18 DAC selftest 1 to 8

Runtime Error Messages

Under unusual operating conditions, the front panel display may show OVLD. This indicates that the output voltage or current is beyond the range of the meter readback circuit. If the front panel display indicates -- -- -- -- -- -- , an HP-IB measurement is in progress. Appendix C lists other error messages that may appear at runtime.

Line Fuse

If the ac source appears "dead" with a blank display and the fan not running, first check your power source to be certain line voltage is being supplied to the ac source. If the power source is normal, the ac source line fuse may be defective. If the ac source has a defective fuse, replace it only once. If it fails again, investigate the reason for the failure. Proceed as follows:

1. Turn off the front panel power switch and remove the input power (unplug the power cord or open the safety disconnect).

2. Remove the fuse cover from the rear panel.

3. Unscrew the fuse caps and emove the fuses.

4. If any fuses are defective, replace all three with fuses of the same type (see chapter 1).

5. Turn on theac source and check the operation. If it is normal. replace the fuse cover.

Maintenance Note: It is recommended that new fuses be installed every four years.

Front panel Operation

Introduction

Here is what you will find in this chapter:

♦ a complete description of the front panel controls ♦ front panel programming examples that describe:

• how to program the output voltage and frequency

• how to measure the output

• how to program the output pulses and lists

• how to trigger output changes

Front Panel Description

HEWLETT PACKARD

LINE

300 V rms 50 VA 1

6812A

AC POWER SOURCE / ANALYZER

115.0V 60.0HZ

CV CC CR CP Unr Dis Tran OCP Prot Cal Shift Rmt Addr Err SRQ

VOLTAGE FREQUENCY

Off

2 5 6 7

METER

OUTPUT

SYSTEM

Local

Error Address

Save Recall

FUNCT ION ENTRY

Harmonic

Current

Index

Voltage

Meter

Output

Phase

Input

Status

Protect

Trigger Trigger

Control

Index

Freq

Shape

Phase

Select

List Pulse

Output on/off

Calibration

7 8 9

5 6

Enter

321

Clear Entry

Figure 4-1. Front Panel, Overall View

4 - Front Panel Operation

ϕ Display κ Annunciators

λ Voltage/

Frequency

ν Line ο System Keys

π Function Keys

θ Entry Keys

14-character vacuum fluorescent display for showing programmed commands and measured values.

Annunciators light to indicate operating modes and status conditions:

φ1, φ2, φ3 Phase 1, 2, or 3 is being controlled or metered. CV The ac source output is in constant-voltage mode. CC The ac source output is in constant-current mode. Unr The ac source output is in an unregulated state. Dis The ac source output is disabled (off). Tran The ac source output is initialized to output a transient. OCP The overcurrent protection state is enabled. Prot One of the ac source's output protection features is activated. Cal The ac source is in calibration mode. Shift The Shift key is pressed to access an alternate key function. Rmt The selected interface (HP-IB or RS-232) is in a remote state. Addr The interface is addressed to talk or to listen. Err There is a message in the SCPI error queue. SRQ The interface is requesting service from the controller. Meter Front panel measurement functions are: ac only, dc only, or ac+dc AC+DC Output The ac source output coupling is: ac only, or ac+dc AC+DC

The rotary pulse generators let you set the output voltage and frequency when the ac source is in local mode. Their response is rate sensitive.

 Turning a control rapidly provides coarse control of the value.  Turning a control slowly provides fine control of the value.

This turns the ac source on or off. The system keys let you:

 Return to Local mode (front panel control)  Set the ac source HP-IB address  Set the RS-232 interface communication baud rate and parity bit  Display SCPI error codes and clear the error queue  Save and recall up to 4 instrument operating configurations

Function access command menus that let you:

 Program output voltage, current limit, frequency, and output waveforms  Turn the ouput on and off  Select metering functions  Send immediate triggers from the front panel  Program transient output functions  Set and clear protection functions  Select output phases  Select the coupling for output and meter functions  Monitor instrument status

Entry keys let you:

 Enter programming values  Increment or decrement programming values  Calibrate the ac source

Front Panel Operation - 4

Local

Address

qpã

Recall

System Keys

Refer to the examples later in this chapter for more details on the use of these keys.

SYS T E M

Local

Error

Address

Save Recall

Figure 4-2. System Keys

This is the blue, unlabeled key, which is also shown as in this guide.

Shift

Pressing this key accesses the alternate or shifted function of a key (such as

ERROR ). Release the key after you press it. When the Shift annunciator is lit,

the shifted keys are active. Press to change the ac source's selected interface from remote operation to local

(front panel) operation. Pressing the key will have no effect if the interface state is already Local, Local-with-Lockout, or Remote-with-Lockout.

Press to access the system address menu. This menu lets you configure the ac source's interface and other system parameters. Address Menu entries are stored in non-volatile memory.

Display Command Function

ADDRESS <value> Sets the HP-IB Address INTF <char> Selects an interface (HPIB or RS232) BAUDRATE<value> Selects baud rate (300, 600, 1200, 2400, 4800, 9600) PARITY <char> Message parity (NONE, EVEN, ODD, MARK, SPACE) LANG <char> Selects language (SCPI or E9012) NOUTPUTS <char> Select number of output phases on HP 6834B only (1 or 3)

value = a numeric value char = a character string parameter Use and to scroll through the command list. Use and to scroll through the parameter list.

Shift

Error

SaveShift

Press to place the ac source into a previously stored state. You can recall up to 16 (0 through 15) previously stored states.

Press to display the system error codes stored in the SCPI error queue. This action also clears the queue. If there is no error in the queue, 0 is displayed.

Press to store an existing ac source state in non-volatile memory. The parameters saved are listed under *SAV in the ac source Programming Guide. You can save up to 16 states (0 through 15).

4 - Front Panel Operation

On/Off

Select

Function Keys

Refer to the examples later in this chapter for more details on the use of these keys.

Harmonic

Meter

Output

Input

Status

Protect

Trigger Trigger

Control

FUNCTION

Current Voltage

Phase

Freq

Shape

List Pulse

Phase

Select

Output

on/off

Index

Figure 4-3. Function Keys

Immediate Action Keys

Immediate action keys immediately execute their corresponding function when pressed. Other function keys have commands underneath them that are accessed when the key is pressed.

Output

Phase

This key toggles the output of the ac source between the on and off states. It immediately executes its function as soon as you press it. When off, the ac source output is disabled and the Dis annunciator is on.

This key only applies to three-phase ac sources. It selects the phase to which function commands will be sent, as well as the phase that will be monitored by the Meter and Harmonic functions. At power-on, all phases are selected or coupled, indicating that commands will be sent to all phases. The presently selected phase is indicated by a phase annunciator. Pressing Phase Select immediately selects a different phase. Phase selection is circular; you can return to the starting position by continuously pressing Phase Select.

Annunciator On Phase Selected

φ1, φ2, φ3 All phases selected (phases coupled= ALL)

φ1 Phase #1 selected (phases coupled= NONE) φ2 Phase #2 selected (phases coupled= NONE) φ3 Phase #3 selected (phases coupled= NONE)

Does not apply to Meter or Harmonic functions.

When the Meter and Harmonic functions are active, Phase Select only rotates through 1, 2, and 3. This is because the Meter and Harmonic functions cannot display multiple phase readings simultaneously. Therefore, it is not possible to select all phases with these functions.

TriggerShift

Sends an immediate trigger to the ac source

Front Panel Operation - 4

Enter

qpÇ

Scrolling Keys

Scrolling keys let you move through the commands in the presently selected function menu.

• ‚

These scroll keys let you move through the choices in a command list. Press to bring up the next command in the list. Press to go back

to the previous command in the list. Function menus are circular; you can return to the starting position by continuously pressing either key. The following example shows the commands in the Input function menu:

pIndexShift

Shift qIndex

These shifted scroll keys apply only to the Harmonic and List functions. Press these keys to step through integers 0 through 50 when specifying the desired harmonic number, or 0 through 99 when specifying the desired list point. Hold down these keys to rapidly access any harmonic or list point.

These Entry keys let you scroll through choices in a parameter list that apply to a specific command. Parameter lists are circular; you can return to the starting position by continuously pressing either key. If the command has a numeric range, these keys increment or decrement the existing value.

Meter Display Keys

Metering keys control the metering functions of the ac source.

Meter

Input

Press this key to access the meter menu list.

Display Measurement

<reading>V <reading>Hz rms voltage and frequency (the default) <reading>V <reading>A rms voltage and rms current <reading>A <reading>Hz rms current and frequency (the default) <reading>V <reading>W rms voltage and power <reading> CREST F current crest factor <reading>A PK REP peak current, repetitive <reading>A PK NR peak current, nonrepetitive

<reading> VA apparent power <reading> VAR reactive power <reading>W TOTAL total power of all phases <reading> PFACTOR power factor <reading>A NEUTRAL neutral rms current

Press this key to specify the following metering functions.

Display Command Function

INP:COUP <char> Choose meter coupling (AC, DC or ACDC) WINDOW <char> Select harmonic measurement window meter

(KBESSEL, RECT)

Notes:

Displays the highest peak current since it was last cleared.The value is cleared when

you scroll into this selection or press or

This selection only valid for HP 6834B reading = the returned measurement char = a character string parameter and scroll through the command list. and scroll through the parameter list.

Clear Entry

4 - Front Panel Operation

Current

HarmonicShift

Press this key to access the harmonic menu list

Display Measurement

<reading>A I:MAG: <index> current harmonic magnitude <reading>° I:PHASE: <index> <reading>V V:MAG: <index> voltage harmonic magnitude <reading>° V:PHASE: <index> <reading> N:MAG: <index> neutral current harmonic magnitude <reading>° N:PHASE: <index> <reading>° CURR:THD <reading>° VOLT:THD

current harmonic phase

voltage harmonic phase

neutral current harmonic phase current total % harmonic distortion voltage total % harmonic distortion

Output Control Keys

Output control keys control the output functions of the ac source.

Voltage

Press this key to access the voltage menu list.

Display Command Function

VOLT <value> VOLT:T<value> VOLT:M <char> RANGE <char> SLEW <value> SLEW:T<value> SLEW:M <char>

ALC <char> Select the voltage sense source (INT or EXT)

Set immediate rms output voltage (φ) Set triggered rms output voltage (φ) Select the voltage mode (φ) (FIXED, STEP, PULSE or LIST) Select the voltage range (φ) (150 or 300) Set immediate voltage slew rate in volts/second (φ) Set triggered voltage slew rate in volts/second (φ) Select the voltage slew mode (φ) (FIXED, STEP, PULSE or

LIST)

Shift

Freq

Press this key to access the current menu list.

Display Command Function

CURR:LEV <value> Set immediate rms output current limit

Press this key to access the frequency menu list.

Display Command Function

FREQ <value> Set immediate output frequency FREQ:T<value> Set triggered output frequency FREQ:M <char> Select the frequency mode (FIXED, STEP, PULSE or LIST) SLEW <value> Set immediate frequency slew rate in volts/second SLEW:T<value> Set triggered frequency slew rate in volts/second SLEW:M <char> Select the frequency slew mode (FIXED, STEP, PULSE or

LIST)

Notes:

φ = phase selectable on HP 6834B reading = the returned measurement index = a numeric value that represents the harmonic number from 0 to 50 char = a character string parameter

qpÇÈp

IndexqIndex

Shift

Phase

and scroll through the command list. and scroll through the parameter list. and specify the desired harmonic.

Press this key to access the phase menu list.

Display Command Function

PHASE <value> PHASE:T <value> PHASE:M <char>

Set immediate output phase (φ) Set triggered output phase (φ) Select the phase mode (φ) (FIXED, STEP, PULSE or LIST)

Front Panel Operation - 4

Shape

Pulse

Shift

Output

Press this key to access the shape menu list.

Display Command Function

SHAPE <char> Select the immediate output wave shape 1 (SINE,

SQUARE, or CSINE) CSIN = clipped sine wave

SHAPE:T <char> Select the triggered output wave shape (SINE, SQUARE, or

CSINE) CSIN = clipped sine wave SHAPE:M <char> Select the shape mode (FIXED, STEP, PULSE or LIST) CLIP <value> Set the clipping level of the CSIN wave shape. This

specifies the point where clipping starts as a percentage of

the peak amplitude or percentage of THD.

Press this key to access the pulse menu list.

Display Command Function

WIDTH <value> Set the pulse width COUNT <value> Set the number of output pulses DCYCLE <value> Set the pulse duty cycle as a percentage of the pulse period PER <value> Set the pulse period HOLD <char> Set the parameter that will be held constant as the other

parameters change (WIDTH or DCYCLE)

Press this key to access the output menu list.

Display Command Function

*RST Execute *RST command to place the ac source in the

factory-default state TTLT:SOUR <char> Select Trigger Out source coupling (BOT, EOT or LIST)

BOT = beginning of trensient

EOT = end of transient

LIST = TTLT trigger (see Programming Guide) TTLT:STATE <value> Set Trigger Out state (ON or OFF) PON:STATE <char> Select power-on state command (RST or RCL0) RI <char> Sets remote inhibit mode (LATCHING, LIVE, or OFF) DFI <char> Sets discrete fault indicator state (ON or OFF) DFI:SOUR <char> Select the DFI source (QUES, OPER, ESB, RQS, or OFF)

(see chapter 4 of Programming Guide)

4 - Front Panel Operation

qpÇ

Protect

Enter

qpÇ

Notes:

User defined waveshapes will also appear in this list when created.

φ = phase selectable on HP 6834B value = a numeric value char = a character string parameter and scroll through the command list. and scroll through the parameter list.

Protection and Status Control Keys

The Protect and Status keys control the protection functions and status registers of the ac source. Refer to chapter 4 of the Programming guide for more information on the status registers.

Press this key to access the protection menu list.

Display Command Function

PROT:CLEAR Clear the status registers of all activated protection signals.

The fault causing a signal must be corrected or removed

before the register can be cleared. CURR:PROT <char> Set overcurrent protection function (ON or OFF). VOLT:PROT <value> Set the overvoltage protection level DELAY <value> Set the time delay for activating a protection fault after

programming the output

StatusShift

Press this key to access the status menu list. Note that in the following list, commands ending in ? clear the registers when they are read. For this reason the registers are read only after you press , not when you scroll to the command

Display Command Function

*CLS Executes the clear status (*CLS) command STATUS:PRESET Execute the STATus:PRESet command *ESR? <value> Return Event Status register value *STB <value> Return Status Byte register value OPER:EVEN? <value> Return STAT:OPER:EVENT? value OPER:COND <value> Return STAT:OPER:COND? value QUES:EVEN? <value> Return STAT:QUES:EVENT? value QUES:COND <value> Return STAT:QUES:COND? value

Notes:

Programmed in peak volts. (Other voltage parameters are programmed in rms volts) value = a numeric value char = a character string parameter and scroll through the command list. and scroll through the parameter list.

Front Panel Operation - 4

Control

qpÇ

IndexqIndex

Trigger and List Control Keys

The Trigger Control key controls output transient triggers. The List key controls the generation of output lists. A list can contain up to 100 points, each of which can specify an output change (or transient). Refer to chapter 4 of the Programming Guide for more information about programming triggers and lists.

Trigger

Press this key to access the trigger control menu list.

Display Command Function

INIT:IMMED Initiate the transient trigger sequence immediately. INIT:CONT <char> Set continuous trigger initiation (ON or OFF). TRIG:SOUR <char> Select transient trigger source (BUS, EXT, TTLT or

IMM). DELAY <value> Set trigger delay in seconds. ABORT Abort all trigger sequences. SYNC:SOUR <char> Select trigger sync source (PHASE or IMM). SYNC:PHASE <value> Set synchronous phase reference angle in degrees.

ListShift

Press this key to access the list commands

Display Command Function

COUNT <value> Specifies the number of times a list repeats. DWEL:<index> <value> List of output dwell times. FREQ:<index> <value> List of output frequencies. FSLW:<index> <value> List of output frequency slew rates PHASE:<index> <value> SHAP:<index> <char> List of output waveform shapes.

STEP<char> Response of list to triggers (ONCE or AUTO). TTLT:<index> <value> List of Trigger Out pulses (0=no pulse; 1=pulse). VOLT:<index> <value> VSLW:<index> <value>

List of output voltage phase angles (φ)

(SINE, SQUARE or CSIN) CSIN = clipped sine wave

List of ac output voltages (φ)

List of output voltage slew rates (φ)

Notes:

User-defined waveshapes will also appear in this list when created.

φ = phase selectable on HP 6834B value = a numeric value char = a character string parameter index = a numeric value that represents a list point from 0 to 99 and scroll through the command list. and scroll through the parameter list. and scroll through the desired list points. EOL is displayed when the end of the list is reached. When a value is edited, pressing automatically advances to the next list point. Pressing truncates or clears the list at the

Clear Entry

Enter

presently displayed list point.

4 - Front Panel Operation

Entry Keys

Refer to the examples later in this chapter for more details on the use of these keys.

−

Calibration

7 8 9

ENTRY

5 6

321

Clear Entry

Enter

Figure 4-4. Entry Keys

äã

These keys let you scroll through choices in a parameter list that apply to a specific command. Parameter lists are circular; you can return to the starting position by continuously pressing either key. If the command has a numeric range, these keys increment or decrement the existing value.

through are used for entering numeric values. is the decimal

.90

point. For example, to enter 33.6 press: 3 3 . 6 Enter.

Enter

Shift

Shift Clear Entry

Shift Calibration

The backspace key deletes the last digit entered from the keypad. This key lets you correct one or more wrong digits before they are entered.

This key executes the entered value or parameter of the presently accessed command. Until you press this key, the parameters you enter with the other Entry keys are displayed but not entered into the ac source. Before pressing

Enter

you can change or abort anything previously entered into the display. After Enter is pressed, the ac source returns to Meter mode in most cases. In Harmonic or List mode, the ac sourse displays the next point in the list.

EShift

This key specifies an exponential power of 10. For example, the the value for 100µs can be entered as either . 0 0 0 1 , or as 1 E − 4

−

This key − is the minus sign. This key aborts a keypad entry by clearing the value. This key is convenient for

correcting a wrong value or aborting a value entry. The display then returns to the previously set function. When editing a list, pressing truncates or

Clear Entry

clears the list at the presently displayed list point. This key accesses the calibration menu (Refer to Appendix B to calibrate your ac

source).

Front Panel Operation - 4

Examples of Front Panel Programming

You will find these examples on the following pages: 1 Setting the output voltage amplitude 2 Setting the output frequency 3 Setting the overcurrent protection feature 4 Generating step, pulse, and list transients 5 Programming trigger delays and phase synchronization 6 Programming slew rates 7 Measuring peak inrush current 8 Setting the HP-IB address or RS-232 parameters 9 Saving and recalling operating states 10 Switching between single- and three- phase operation (HP 6834B only)

The examples in the ac source Programming Guide are similar to the ones in this section, except that they use SCPI commands.

1 - Setting the Output Voltage Amplitude

NOTE: The maximum voltage that the ac source can output is limited by the peak value of the

waveform, which is 425 V

. Since the output is programmed in units of rms volts, the

peak

maximum value that can be programmed is dependent on the peak-to-rms ratio of the selected waveform. For a sinewave, the maximum ac voltage that can be programmed is 300 V

. For other waveforms the maximum may be different.

rms

Procedure for Single-Phase AC Sources

When you turn on the ac source, the default output shape is a 60 Hz sinewave at 0 Vrms. There is no output from the ac source because the default output state is OFF, as indicated by the Dis annunciator. Set

the output to 120 V rms as follows:

Action Display

You can set the voltage in any of three ways:

On the Function keypad, press Voltage. On the Entry keypad, press 1 2 0 Enter. This is the easiest way to enter an accurate value.

2. On the Function keypad, press Voltage. On the Entry keypad, press Ç or È to

increment or decrement the existing value. This technique is useful when you are making minor changes to an existing value.

3 Rotate the front panel Voltage knob to obtain 120 V. This method is best when you

want to enter a value without using the voltage menu. Note: You will not see the new voltage on the front panel meter unless the output is

enabled.

VOLT 120

VOLT 127

120 V 60 Hz

To enable the output:

On the Function keypad, press Output On/Off. The Dis annunciator will go off, indicating that the voltage is now applied to the output terminals.

120 V 60 Hz

4 - Front Panel Operation

Procedure for Three-Phase AC Sources

If you have a three-phase ac source, you can set the rms voltage of all three phases indentically, or set each one differently. This is controlled via the Phase Select Menu on the Function keypad.

The following example shows how you can set the phase 1 output to 120 Vrms, phase 2 to 180 Vrms,

and phase 3 to 235 Vrms.

Action Display

1. On the Function keypad, press Voltage. Note that in the power-on default state,

the φ1, φ2, and φ3 annunciators are all lit, indicating that any comands sent to the instrument will be sent to all three phases.

2. Scroll through the phase selections by pressing Phase Select Pressing Phase Select moves you through phases 1, 2, and 3, as indicated by the

phase annunciators. Pressing it once more returns you to the first state with all three phase annunciators on.

3. While in the Voltage menu press Phase Select to access Phase 1. On the Entry pad press 1 2 0 Enter.

4. Access the Voltage menu again and press Phase Select once to access Phase 2. On the Entry pad press 1 8 0 Enter.

5. Access the Voltage menu again and press Phase Select once to access Phase 3. On the Entry pad press 2 3 5 Enter.

Press Output On/Off to enable the output. The Dis annunciator will go off, indicating that the voltages are now applied to the output terminals.

To verify the output, you can measure it as follows:

Note that the φ3 annunciator is on, indicating that you are monitoring the last phase you selected, which was Phase 3.

Press Phase Select once. The φ1 annunciator will light, indicating that you are now monitoring Phase 1.

VOLT 0

VOLT 120

VOLT 180

VOLT 235

235 V 60 Hz

120 V 60 Hz

Press Phase Select once. The φ2 annunciator will light, indicating that you are now monitoring Phase 2.

10.

Press Phase Select once. The φ3 annunciator will light, indicating that you are now monitoring Phase 3 again.

180 V 60 Hz

235 V 60 Hz

NOTE: The Meter menu does not go to the all-phases state present in the Phase Select menu

because the front panel can display only one phase at a time. Refer to the ac source Programming Guide on how to return simultaneous measurements from all three phases.

Front Panel Operation - 4

2 - Setting the Output Frequency

When you turn on the ac source, the default output frequency is a 60 Hz. Assuming the voltage output from example 1 is in effect (120 Vrms sinewave), change the frequency to 50 Hz as follows:

Action Display

You can set the frequency in the same way that you set the voltage:

1. On the Function keypad, press Freq. On the Entry keypad, press 5 0 Enter. FREQ 50

2. On the Function keypad, press Freq. On the Entry keypad, press Ç or È to increment or decrement the existing value.

Rotate the front panel Frequency knob to obtain 50 Hz.

To verify the output, you can measure it as follows:

On single-phase ac sources, the φ1 annunciator is lit. On three-phase ac sources, the phase annunciator of the last selected phase will be lit. The Meter menu is presently displaying the measured voltage and frequency of the selected output phase.

You can scroll through all of the measurement functions in the Meter Menu by pressing the • and ‚ keys.

FREQ 50

120 V 50 Hz

3 - Setting a Protection Feature

You can set the ac source to disable its output if it detects an overvoltage or overcurrent fault condition. Other automatic fault conditions (such as overtemperature) also will disable the output. Set the

overcurrent protection feature as follows:

Action Display

1. On the Function keypad, press Protect. PROT:CLEAR

2. Press È to obtain the overcurrent command. CURR:PROT OFF

3. On the Entry keypad, press once to scroll to the ON parameter and press Enter. The OCP annunciator will light, indicating that the overcurrent protection circuit is on. CURR:PROT ON

CURR:PROT ON

If you wish to set a time delay between the detection of the fault and the disabling of the output, scroll to the delay command on the protection menu. The default delay is 100 milliseconds.

Enter the delay from the Entry keypad, such as . 2 5 0 Enter.

When you want to restore normal operation after the cause of the overcurrent condition has been removed, scroll to the protection clear command and press Enter. The OCP annunciator then will go off.

DELAY .1

DELAY .250

PROT:CLEAR

4 - Front Panel Operation

4 - Using Transient Voltage Modes

The ac source voltage can be programmed in the following transient operating modes:

STEP causes the output to permanently change to its triggered value. PULSE causes the output to change to its triggered value for a specific time, as determined by the

Pulse menu parameters.

LIST causes the output to sequence through a number of values, as determined by points entered

in the List menu.

FIXED disables transient operation for the selected function.

Step Transient

The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to the output when it receives a trigger. Because the default transient voltage level is zero volts, you must first enter a triggered voltage before you can trigger the ac source to change the output amplitude. Refer to chapter 4 of the Programming Guide for more information about programming triggers.

In the following example, the voltage output is set to 120 Vrms and then stepped down to 102 Vrms.

Action Display

On the Function keypad, press Output On/Off to enable the output. The Dis annunciator will go off.

2. Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0

Enter.

3. Access the Voltage Menu again and press ‚ to access the triggered voltage command.

4. On the Entry kepad, press 1 0 2 Enter. VOLT:T 102

5. Access the Voltage Menu again and press ‚ to access the voltage mode command. It should be in the default FIXED mode. An ac source function in the FIXED mode does not respond to triggers. On the Entry keypad, press Ç or È to scroll through the mode parameters. When you have STEP, press Enter.

6. Press Trigger Control and Enter. This initiates (or enables) one immediate trigger action.

7. Press Shift Trigger. This sends the ac source an immediate trigger signal to change the output voltage. The triggered voltage value now becomes the VOLT value.

0 V 60 Hz

VOLT 120

VOLT:T 0

VOLT:M STEP

INIT:IMMED

102 V 60 HZ

On three-phase ac sources the voltage steps are phase selectable. You can output a different voltage step for each phase. To do this, use Phase Select to first choose the desired phase, as previously described in example 1 for setting the immediate output voltage.

Front Panel Operation - 4

Pulse Transient

In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at 60 Hz. The figure shows the trigger, pulse count, pulse period, and duty cycle.

NOTE: From the Output Menu, execute the *RST command to reset the ac source. This is

necessary because any previously programmed functions remain in effect until cleared.

Trigger

count = 4

120Vrms 102Vrms

83.3ms 250ms

Figure 4-5. Pulse Transients

Action Display

1. Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 0 2 Enter. VOLT 102

2. Press ‚ to access the triggered voltage command. On the Entry keypad, press 1 2 0

VOLT 120

Enter.

3. Access the Voltage Menu again and press ‚ to access the voltage mode command.

VOLT:M PULSE

On the Entry keypad, press Ç or È to scroll through the mode parameters to obtain PULSE and press Enter.

4. Press Pulse to access the Pulse Menu. From the Entry keypad, press

WIDTH .0833

. 0 8 3 3 Enter to enter a pulse width of 83.3 milliseconds.

5. Access the Pulse Menu and press ‚ to access the duty cycle command. From the

DCYCLE 33

Entry keypad, press 3 3 Enter to change the duty cycle to 33%.

6. Access the Pulse Menu and press ‚ to access the pulse count. On the Entry keypad,

COUNT 4

press 4 and Enter.

7. Press Trigger Control and Enter to initiate the transient trigger sequence. INIT:IMMED

8. Press Shift Trigger. This sends the ac source an immediate trigger signal to

102 V 60 HZ

generate the four output pulses.

Note: The ac source output returns to 102 V at the completion of the output pulses.

On three-phase ac sources the voltage pulses are phase selectable. You can output a different voltage

pulse for each phase. To do this, use Phase Select to first choose the desired phase, as previously described in example 1 for setting the immediate output voltage.

4 - Front Panel Operation

List Transient

Lists are the most flexible means of generating multiple or synchronized transient outputs. The following figure shows a voltage output generated from a list. The output shown represents three different ac voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150 milliseconds) separated by 67-millisecond, 0-volt intervals.

The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its corresponding dwell point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal intervals. The count parameter causes the list to execute twice when started by a single trigger.

NOTE: From the Output Menu, execute the *RST command to reset the ac source. This is

necessary because any previously programmed functions remain in effect until cleared.

Trigger

160 Vrms

0 1

3 4 5

List Count = 1 List Count = 2

Figure 4-6. List Transients

Action Display

1. Press Voltage to access the Voltage Menu. Then press ‚ to access the voltage mode

command.

2. On the Entry keypad, press Ç or È to scroll through the mode parameters to obtain

LIST and press Enter.

3. Access the List Menu by pressing Shift List. The first menu command is the count. From the Entry keypad, change the list count from the default (1) to 2. Press Enter.

4. Access the List menu again and press ‚ until you access the dwell time. This specifies the "on" time for each voltage point, which is effectively the output pulse width. The first dwell point (0) appears in the display. On the Entry keypad, press . 0 3 3 and Enter.

5. Pressing the Enter key automatically advances to the step in the list. Enter the following values for dwell list points 1 through 5: .067, .083, .067, .150, .067. Press Enter to enter each value. When you finish, you will be at point 6, which is the end of the list.

Note: Press Shift •Index or Shift ‚Index to access and edit any list point.

6. Press ‚ until you access the voltage list. This specifies the amplitude of each output point during its corresponding dwell period. The first voltage list point (0) appears in the display. On the Entry keypad, press 1 6 0 and Enter.

VOLT:M

FIXED

VOLT:M LIST

COUNT 2

DWEL 0 .033

DWEL 1 .067 DWEL 2 .083 DWEL 3 .067 DWEL 4 .150 DWEL 5 .067

DWEL 6 EOL

VOLT 0 160

7. Pressing the Enter key automatically advances to the step in the list. Enter the following values for voltage list points 1 through 5: 0, 120, 0, 80, 0. Press Enter to enter each value. When you finish, you will be at point 6, which is the end of the list.

Note: Press Shift •Index or Shift ‚Index to access and edit any list point.

8. Press ‚ until you access the step command. Check that it is at the default mode (AUTO). This lets a single trigger run your list for the specified count.

VOLT 1 0 VOLT 2 120 VOLT 3 0 VOLT 4 80 VOLT 5 0

VOLT 6 EOL

STEP AUTO

Front Panel Operation - 4

Press Output On/Off to enable the output. The Dis annunciator will go off.

10. Press Trigger Control and Enter to initiate the transient trigger sequence. INIT:IMMED

11. Press Shift Trigger. This sends the ac source an immediate trigger to generate the four output pulses. The output returns to the immediate value at the end of the list.

Note: To clear a list, press Clear Entry. This truncates or clears the list at the presently displayed list point. Each list must be accessed and cleared separately.

0 V 60 Hz

On three-phase ac sources the voltage lists are phase selectable. You can output a different voltage list for each phase. To do this, use Phase Select to first choose the desired phase, as previously described in example 1 for setting the immediate output voltage.

5 - Trigger Delays and Phase Synchronization

The ac source trigger system also lets you program trigger delays as well as synchronize output changes to a specific phase angle of the output waveform.

In example ϕ, the output transient is triggered immediately at the receipt of the trigger signal. In example ‚, a delay time of approximately 16.7 milliseconds elapses between the occurence of the trigger and the start of the output transient. In example ƒ, the trigger source is programmed for phase synchronization, which means that the transient occurs at the first occurrence of the specified phase angle after the trigger signal is received. Example µ describes phase synchronization on three phase ac sources.

Note that phase synchronization is referenced to an internal phase signal. The output of the unit is normally offset by 0° with respect to this internal reference. Because synchronized transient events always occur with respect to the internal reference, the output will normally be in phase with the value programmed for phase synchronization. (The Phase command can be used to change the offset of the output with respect to the internal phase reference.)

4 - Front Panel Operation

VOLT T level

VOLT level

VOLT T level

VOLT level

Trigger

0.000

VOLT T level

VOLT level

0.0167

Figure 4-7. Trigger Delays and Phase Synchronization

Example Display

This example uses the default trigger parameters. First, access the Voltage

menu and program the immediate and triggered voltage levels, followed by the voltage transient mode.

Then press Trigger Control and Enter, followed by Shift Trigger. In this example, you will set a trigger delay. First, access the Voltage menu

‚

and program the immediate and triggered voltage levels, followed by the voltage transient mode.

Press Trigger Control. Then press ‚ until you access the delay parameter. On the Entry keypad, press . 0 1 6 7 Enter.

Then press Trigger Control and Enter, followed by Shift Trigger. This example uses the phase sync mode with no delay, but synchronized at

90. First, access the Voltage menu and program the immediate and triggered voltage levels, followed by the voltage transient mode.

VOLT 120

VOLT:T 150

VOLT:M STEP

INIT:IMMED

VOLT 120

VOLT:T 150

VOLT:M STEP

DELAY 0

DELAY .0167

INIT:IMMED

VOLT 120

VOLT:T 150

VOLT:M STEP

Press Trigger Control. Press ‚ until you access the delay parameter. If necessary, set it to 0. Press ‚ until you access the sync source command. On the Entry keypad, press È to obtain PHASE. Press Enter.

Access the Trigger Control menu again and press ‚ to access the sync phase reference parameter. On the Entry keypad, program a 90° phase reference by entering 9 0 Enter.

Then press Trigger Control and Enter, followed by Shift Trigger.

DELAY 0

SYNC:SOUR PHASE

SYNC:PHAS 90

INIT:IMMED

Front Panel Operation - 4

On three-phase ac sources, phase 1 is normally offset by 0° from the internal phase reference while phase 2 and phase 3 are offset by 240° and 120° respectively. Therefore, synchronized transient events will occur at the phase angle programmed for the phase 1 output, but at different phase angles on the phase 2 and phase 3 outputs.

This is illustrated in the following figure, where the transient occurs at the 90° angle programmed for the phase 1 output, but at 330° and 210° for the phase 2 and 3 outputs, because of the default offsets for these outputs.

VOLT T level

VOLT level

VOLT T level

VOLT level

VOLT T level

VOLT level

Trigger

210

330

Figure 4-8. Phase Synchronization on Three-phase Sources

Example Display

µ This example synchronizes a change at 90° on phase 1. First, access the

Voltage menu and program the immediate and triggered voltage levels, followed by the voltage transient mode. Check that the φ1, φ2, and φ3 annunciators are all lit, indicating that comands will be sent to all three phases. If not, press Phase Select untill all three annunciators are lit.

phase = 0

phase = 240

phase = 120

VOLT 120

VOLT:T 150

VOLT:M STEP

Press Trigger Control. Press ‚ until you access the sync source command. On the Entry keypad, press È once to obtain PHASE. Press Enter.

Access the Trigger Control menu again and press ‚ to access the sync phase reference parameter. On the Entry keypad, program a 90° phase reference by entering 9 0 Enter.

Then press Trigger Control and Enter, followed by Shift Trigger.

SYNC:SOUR PHASE

SYNC:PHAS 90

INIT:IMMED

4 - Front Panel Operation

New VOLT level

TRIGGER

VOLT:T level

SLEW [0]

SLEW [1]

APPLIED

LIST

COMPLETE

width

SLEW rate

SLEW:T rate

VOLT:T level

SLEW:T rate

SLEW rate

SLEW:T

rate

SLEW rate

SLEW [3]

SLEW [2]

VOLT level

6 - Using Slew Rates to Generate Waveforms

As shown in the previous examples there are a number of ways that you can generate custom waveforms. Programmable slew rates provide additional flexibility when customizing waveforms. The following figure illustrates how programmable slew rates are applied in the transient operating modes.

In example •, an immediate slew rate of 50 volts/second is used whenever a new output voltage is programmed. In example ‚, a triggered slew rate of 50 volts/second steps the voltage level to its new value. 50 volts/second becomes the new immediate slew rate in step mode. In example ƒ, a triggered slew rate of 50 volts/second is used at the start of the pulse. The immediate slew rate of infinity applies at the trailing edge of the pulse. In example „, the slew rates are set by the values in the voltage slew list.

1 SLEW:MODE FIXED

2 SLEW:MODE STEP

3 SLEW:MODE PULSE

4 SLEW:MODE LIST

Figure 4-8. Programming Slew Rates

Front Panel Operation - 4

Example Display

This example uses the immediate slew rate. First, access the Voltage menu

and press ‚ until you access the mode command. On the Entry keypad, press È to obtain FIXED. Press Enter.

Access the voltage menu and press ‚ until you access the slew command. On the Entry keypad, press 5 0 Enter to program a slew rate of 50 volts/second.

Whenever a new immediate voltage value is entered, the output will slew to the new level at 50 volts/second.

Step mode uses the triggered slew rate. First, access the Voltage menu,

‚

program the immediate and triggered voltage levels, and set the slew mode to STEP.

Access the Voltage menu and press ‚ to access the immediate slew command. On the Entry keypad, enter a value that equals infinity.

Access the Voltage menu and press ‚ until you access the triggered slew command. On the Entry keypad, enter a value such as 5 0 Enter, which sets the triggered slew rate to 50 volts/second.

Then press Trigger Control and Enter, followed by Shift Trigger. After the trigger has been sent, in step mode, the triggered value becomes the

new immediate value.

Pulse mode uses the triggered slew rate at the leading edge of the pulse, and

the immediate slew rate at the trailing edge of the pulse. First, access the Voltage menu, program the immediate and triggered voltage levels, and set the slew mode to PULSE.

VOLT:M FIXED

SLEW 50

VOLT 120

VOLT:T 150

SLEW:M STEP

SLEW: 9.9+E37

SLEW:T 50

INIT:IMMED

VOLT 120

VOLT:T 150

SLEW:M PULSE

Access the Pulse menu and program the pulse count, duty cycle, and pulse period.

Access the Voltage menu and press ‚ to access the immediate slew command. On the Entry keypad, enter a value that equals infinity.

Access the Voltage menu and press ‚ until you access the triggered slew command. On the Entry keypad, enter a value such as 5 0 Enter, which sets the triggered slew rate to 50 volts/second.

Then press Trigger Control and Enter, followed by Shift Trigger. When the voltage slew mode is set to LIST, the slew rates are set by the

„

values in the voltage slew list. Refer to the List Transient example for more information on how to program lists. You must program the voltage values and dwell times as explaied in that example. You must also program a slew rate for each point in the list (even if it is 9.9+E37).

COUNT 2

DCYCLE 33

PER .0166

SLEW: 9.9+E37

SLEW:T 50

INIT:IMMED

4 - Front Panel Operation

NOTE: When specifying a dwell time, you must take the slew time into consideration. If the dwell

time at any given list point is less than the slew time at the same point, the voltage will never reach its programmed level before the next list point becomes active.

7 - Measuring Peak Inrush Current

Peak inrush current is a non-repetitive measurement in the sense that peak inrush current occurs only when the unit under test is first turned on. In order to repeat the measurement, you must turn the unit off and wait for any input filter capacitors to discharge completely.

This example shows you how you can measure the peak inrush current using the front panel meter. The voltage is set to 120 V rms and the output is triggered at an output phase of 75°, which optimizes the conditions under which inrush current is applied to the unit under test.

Action Display

1. Set the immediate voltage to 0. Press Voltage, then press 0 and Enter. VOLT 0

2. Set the triggered voltage to 120 V rms. In the Voltage menu, press ‚ to access the triggered voltage command. Then press 1 2 0 Enter.

3. Set the voltage mode to step. In the Voltage menu, press ‚ to access the mode command. Press È to scroll to STEP and press Enter.

4. Make sure the unit is operating in the low voltage range. (The low voltage range has twice the output curent rating of the high voltage range.) In the Voltage menu, press ‚ to access the range command. If necessary, press È to set the range to 150 and press Enter.

5. Make sure the triggered voltage slew rate is set to the fastest possible speed. In the Voltage menu, access the triggered slew command. If necessary, reset the slew rate to a faster speed.

6. Make sure the peak current and rms current limits are set to high values. In the Current menu, access the rms current limit and then the peak current limit commands. If necessary, reset the rms current and the peak current limits to higher values. (HP 6811B units have an rms current limit of 3.25 A. HP 6813B units have an rms current limit of 13 A and a peak current limit of 80 A)

7. Synchronize the trigger source with a reference phase angle. In the Trigger Control menu, press ‚ to access the sync source command. Press È to obtain PHASE and press Enter.

Set the reference phase angle to 75°. In the Trigger Control menu, press ‚ to access the sync phase command. Then press 7 5 Enter.

VOLT:T 120

VOLT:M STEP

RANGE 150

SLEW:T 9.9000+E37

CURR:LEV 6.5

CURR:PEAK 40

SYNC:SOUR PHASE

SYNC:PHAS 75

9. Initiate (or enable) the unit for one immediate trigger from the front panel. Press Trigger Control and Enter.

10. Set the meter function to measure nonrepetitive peak inrush current. In the Meter menu, press ‚ to access the peak inrush current display.

11. Enable the output by pressing Output On/Off. 0 V 60 HZ

12. Send the trigger to step the output from 0 V to 120 V. Press Shift Trigger. The inrush current is displayed on the Meter.

INIT:IMMED

0 A PK NR

48 A PK NR

Front Panel Operation - 4

On three-phase ac sources you can only return the peak inrush current from the selected phase because the front panel can only display one phase at a time. Refer to the ac source Prorammming Guide on how to return simultaneous measurements from all three phases.

8 - Setting the HP-IB Address and RS-232 Parameters

Your ac source is shipped with the HP-IB address set to 5 This address can only be changed from the front panel using the Address menu located under the Address key. This menu is also used to select the RS-232 interface and specify RS-232 parameters such baud rate and parity.

Action Display

To set the HP-IB address, proceed as follows:

1. On the System keypad, press Address. ADDRESS 5

2. Enter the new address. For example, Press 7, Enter. ADDRESS 7

To configure the RS-232 interface, proceed as follows:

1. On the System keypad, press Address. ADDRESS 5

2. Scroll through the Address menu by pressing ‚ . The interface command lets you select the RS-232 interface. The baudrate command lets you select the baudrate. The parity command lets you select the parity.

3. The Ç and È keys let you select the command parameters.

INTF RS232

BAUDRATE 600

PARITY EVEN

9 - Saving and Recalling Operating States

You can save up to 16 states (from location 0 to location 15) in non-volatile memory and recall them from the front panel. All programmable settings are saved.

Action Display

To save an operating state in location 1, proceed as follows:

1. Set the instrument to the operating state that you want to save.

2. Save this state to location 1. Press Shift Save 1 Enter. *SAV 1

To recall a saved state in location 1, proceed as follows:

1. Recall the state saved in location 1 by pressing Recall 1 Enter *RCL 1

To select the power-on state of the ac source, proceed as follows:

1. On the Function keypad, press Shift Output, and scroll through the Output menu until you get to the PON state command.

2. Use the Ç and È keys to select either RST or RCL0. RST sets the power-on state of the unit as defined by the *RST command. RCL0 sets the power-on state of the unit to the state saved in *RCL location 0.

PON:STATE RST

4 - Front Panel Operation

To clear the non-volatile memory of the ac source, proceed as follows:

1. On the Function keypad, press Shift Output and scroll to the *RST com-

mand. Then press Enter. This returns the unit to the factory-default settings.

2. Save these settings to location 1. Press Shift Save 1 Enter. *SAV 1

3. Repeat step #2 for memory locations 2 through 16.. *SAV 2

*RST

*SAV 3

*SAV 4

. .

...*SAV 16

10 - Switching Between Single- and Three-phase Operation (HP 6834B only)

When shipped from he factory, the HP 6834B ac source is configured for three-phase operation. You can configure the HP 6834B for single-phase operation. Tis increases the available ouptut power forphase 1 from 1.5 kVA to 4.5 kVA.

NOTE: When you configure the HP 6834B for single-phase operation, the phase 2 and phase 3

output terminals are internally connected to the phase 1 output terminal. This distributes the increased available output power across the three output terminals.

Additionally, switching the HP 6834B between single-phase and threee-phase operation causes the following actions:

♦ it disables all outputs ♦ it reconfigures the current readback and programming calibration constants ♦ it returns all lists and *RCL states to their factory default states ♦ it reboots the unit, after which the newly selected number of phases becomes available

NOTE: This may require you to reprogramt he lists and recall states each time the outputs are

switched.

Action Display

On the System keypad, press Address.

2. Press ‚ to scroll through the address menu until you get to the NOUTPUTS command.

3 Use the Ç and È keys to select the number of output phases; either 1 (single-phase)

or 3 (three-phase).

ADDRESS 5

NOUTPUTS 3

NOUTPUTS 3 NOUTPUTS 1

Specifications

Performance specifications are warranted over the ambient temperature range of 0 to 40 oC. Unless otherwise noted, specifications are per phase for a sinewave with a resistive load at an output frequency range of 45 Hz to 1 kHz (45 Hz-1kHz, HP 6843A) after a 30-minute warmup.

Table A-1. Performance Specifications

Parameter HP 6814B HP 6834B HP 6843B Phases: 1 3 1 1 Maximum Output Ratings

rms Voltage2: Power:

rms Current:

Repetitive peak Current:

Crest Factor (current): Output Frequency Range: Constant Voltage Ripple and Noise Load Regulation: Line Regulation: Maximum Total Harmonic Distortion:

Programming Accuracy (@ 25oC ±5oC)

rms Voltage:

Frequency:

Phase: (HP 6834B in 3-phase mode)

Measurement Accuracy (@25oC ±5oC)

rms Voltage

rms Current

Frequency:

Power (VA):

Power (Watts):

Power Factor:

Specifications subject to change without notice.

From line to neutral on HP 6834B

3 kVA 1.5 kVA/phase 4.5 kVA 4.8 kVA

20 A low range 10 A low range 30 A low range 32 A low range

10 A high range 5 A high range 15 A high range 16 A high range

80 A low range 40 A low range 120 A low range 96 A low range

40 A high range 20 A high range 60 A high range 48 A high range

4 4 4 3

dc; 45 Hz−5 kHz dc; 45 Hz−1 kHz

N/A 0.1% (45-100 Hz)

1% (>100−1 kHz)

1% + 1%/kHz

(>1k−5 kHz)

0.5% + 250 mV (45 Hz − 1 kHz)

0.5% + 0.1%/kHz + 250 mV (>1 kHz − 5 kHz)

0.1% + 50 mA 0.1% + 25 mA 0.1% + 50 mA 0.1% + 50 mA

0.01% + 0.01Hz 0.01% + 0.01Hz 0.01% + 0.01Hz 0.01% + 0.01Hz

0.15% + 5 VA 0.15% + 3 VA 0.15% + 5 VA 0.15% + 9 VA

0.15% + 5 W 0.15% + 3 W 0.15% + 5 W 0.15% + 9 W

0.01 0.01 0.01 0.01

150 V low range;

300 V high range

−60 dB (20 kHz−10 MHz)

1% (45 Hz−1 kHz);

1% + 1%/kHz (>1 kHz−5 kHz)

0.15% + 0.3 V (45−100 Hz)

0.5% + 0.3 V (>100−500 Hz) 1% + 0.3 V (>500−5 kHz)

0.01% + 10 µHz

0.5%

0.1%

N/A N/A

0.05% + 250 mV

A - Specifications

Supplemental Characteristics

Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typical performance determined either by design or type testing.

Table A-2. Supplemental Characteristics

Parameter HP 6814B HP 6834B HP 6843A

AC Input Voltage Range:

AC Input Frequency: Output Isolation Voltage: Maximum Input Current (rms):

Maximum Input Power: Average Programming Accuracy:

Average Programming Resolution

rms Voltage: Overvoltage Programming (OVP): rms Current:

Output Frequency: Phase (HP 6834B in 3-phase mode):

Average Measurement Resolution

rms Voltage: rmsCurrent:

List Dwell Time Triggering Accuracy with Respect to Phase

Synchronization: Trigger In Response Time: Minimum Resolution for Dropout: Output Response Time:

(output change from 10 to 90% or 90 to 10% of its total excursion with full resistive load)

Remote Inhibit Response Time: Remote Sense Capability: Waveform Table Resolution (voltage): Harmonic Measurement Time (amplitude):

RS-232 Interface Capabilities

Baud Rates: Data Format: Language:

Trig In/Trig Out Characteristics

Trig Out (HC TTL output):

Trig In (10k pullup):

18 A low range

10 A high range

5.8 kVA/4.1 kW 8.9 kVA/5.9 kW 8.9 kVA/5.9 kW

0.2% + 80 mA 0.2%+40mA (3-

80 mV 80 mV 80 mV

2 V 2 V 2 V

5 mA 2.5 mA (3-phase)

10 µHz 10 µHz 10 µHz

N/A

10 mV 10 mV 10 mV

3 mA 6 mA (3-phase)

0−4.30133 x 105s 0−1.07533 x 106s 0−4.30133 x 105s

100 µs 250 µs 100 µs 200 µs 400 µs 200 µs

Up to 10 Vrms can be dropped across each load lead.

7 bits even or odd parity; 8 bits without parity

SCPI (Standard Commands for Programmable Instruments),

180−254 Vac (3-phase) or

360−440 Vac (3-phase)

47−63 Hz

300 Vrms

24 A low range

15 A high range

phase)

0.2%+80mA (1-phase)

7.5 mA (1-phase)

0.001° (45Hz−1kHz)

2 mA (1-phase)

500 µs

50 µs

<1 ms

1024 points

1 harmonic ≤100 ms;

all 50 harmonics ≤2 s

300, 600, 1200, 2400, 4800, 9600

Elgar 9012 PIP

Vol = 0.8 max. @ 1.25 mA

Voh = 3.3 V max. @ 1.25 mA

Vil = 0.8 V max.

Vih = 2 V max.

15 A high range

24 A low range

0.2% + 80 mA

7.5 mA

N/A

6 mA

Table A-2. Supplemental Characteristics (continued)

Parameter HP 6814B HP 6834B HP 6843A

INH/FLT Characteristics

Maximum Ratings:

INH Terminals:

FLT Terminals:

Saveable Data (nonvolatile)

Instrument States: User-defined waveforms: List Data:

HP-IB Interface Capabilities

Language: Interface:

Programming Time: Recommended Calibration Interval: Regulatory Compliance

Listed to:

Certified to:

Conforms to: RFI Suppression

Complies with: Dimensions

Height (add 12.7 mm or 0.5 in. for feet)

Width:

Depth: Net Weight: Shipping Weight:

Specifications A

16.5 Vdc between INH terminals; FLT terminals; and from INH terminals to chassis ground

= 1.25 mA max.

Vol = 0.5 Vmax.

Vil = 0.8 V max.

Vih = 2 V min.

tw = 100 µs min.

td = 4 ms typical

16 (0 to 15)

12 (with 1024 data points in each)

1 to 100 points (for each list function)

SCPI, Elgar 9012 PIP

AH1, C0, DC1, DT1, E2, LE1, PP0, RL1, SH1, SR1, TE6

10 ms

1 year

UL 3111-1

CSA 22.2 No. 1010-1

IEC 1010

CISPR-11, Group 1, Class A

262.6 mm (10.3 in.)

430.8 mm (16.96 in.) 602 mm (23.7 in.)

79.5 kg (175 lb) 87.7 kg (193 lb) 87.7 kg (193 lb)

119.1 kg (626 lb) 127.3 kg (280 lb) 127.3 kg (280 lb)

Verification and Calibration

Introduction

This appendix includes verification and calibration procedures for the HP 6814B/6834B/6843A AC Power Solutions. Instructions are given for performing the procedures either from the front panel or from a controller over the HP-IB.

The verification procedures do not check all the operating parameters, but verify that the ac source is performing properly. Performance Tests, which check all the specifications of the ac source, are given in the applicable ac source Service Manual.

Because the output of the ac source must be enabled during verification or calibration, proceed with caution, since voltages and currents will be active at the output terminals.

Important Perform the verification procedures before calibrating your ac source. If the ac source

passes the verification procedures, the unit is operating within its calibration limits and does not need to be recalibrated.

WARNING LETHAL VOLTAGES. Ac sources can supply 424 V peak at their output. DEATH

on contact may result if the output terminals or circuits connected to the output are touched when power is applied. These procedures must be performed by a qualified electronics technician or engineer trained on this equipment.

Equipment Required

The equipment listed in the following table, or the equivalent to this equipment, is required for verification and calibration.

Table B-1. Equipment Required

Equipment Characteristics Recommended Model

Digital Voltmeter

Current Monitor

Ratio Transformer Load Resistors

Impedance Resistor HP-IB Controller

The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in

the load leads and connections. Connect the voltmeter directly to these current-monitoring terminals.

A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test

equipment ratio requirements.

Resolution: 10 nV @ 1 V Readout: 8.5 digits Accuracy: >20 ppm

0.01 Ω, ±200 ppm, (HP 6814B/6834B)

0.001 Ω, ±200 ppm, (HP 6843A)

30:1 ratio, 50 ppm, 45 Hz to 1 kHz 2 − 15 Ω, > 1.5 kW (HP 6814B/6834B) 1 − 5 Ω, > 4.8 kW non-inductive (HP 6843A) 1 Ω, 100 Watts min. (HP 6843A only) Full HP-IB capabilities HP Series 200/300 or equivalent

HP 3458A

Guildline 7320/0.01 Norma Gerts Instruments

B - Verification and Calibration

Test Setup

Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient wire gauge to carry the full output current (see chapter 2).

A. VOLTAGE SETUPB. CURRENT SETUP

RMS VOLTMETER

shunt

RMS VOLTMETER

LOAD

1 30

Switch is for convenience, not required.

CAUTION: Connect only one phase at a time

Figure B-1. Verification & Calibration Test Setup

Performing the Verification Tests

COM

IMPEDANCE

AC INPUT 3 phase

180-254 VAC line to line

360-440 VAC line to line

The following procedures assume you understand how to operate the ac source from the front panel as explained in chapter 4.

When performing the verification tests from an HP-IB controller, you may have to consider the relatively slow settling times and slew rates of the ac source as compared to computer and system voltmeters. Insert suitable WAIT statements into the test program to give the ac source time to respond to test commands.

Perform the following tests for operation verification in the order indicated.

1. Turn-On Checkout

2. Voltage Programming and Measurement Accuracy

3. Current Measurement Accuracy

Turn-On Checkout Procedure

Perform the Turn-On Checkout as directed in chapter 3.

NOTE: The ac source must pass turn-on selftest before you can proceed with the verification tests.

Verification and Calibration - B

Voltage Programming and Measurement Accuracy

This test verifies the voltage programming, HP-IB measurement, and front panel meter functions. Values read back over the HP-IB should be the same as those displayed on the front panel.

Figure B-1 shows the setup. Measure the ac output voltage directly at the output terminals. If you are

verifying a three-phase source, sart by verifying output phase 1.

Action Normal Result

1. Make sure the ac source is turned off. Connect the DVM and ratio transformer as shown in the test setup in Figure B-1.

2. Turn on the ac source with no load. In the Output menu, execute the *RST command to reset the unit to its factory default state.

3. Program the output voltage to 150 volts and set the output current limit to its maximum value.

4. Enable the output by pressing Output On/Off. Output voltage near 150 V.

5. Record voltage readings at the DVM1 and on the front panel display. Readings within low voltage

6. Program the output voltage to 300 volts. Output voltage near 300 V.

7. Record voltage readings at the DVM1 and on the front panel display. Readings within high voltage

If you are verifying a 3-phase source, repeat steps 1 through 7 for phases 2 and 3. Press Phase Select to select the next phase.

Multiply the DVM reading by the transformer ratio if a ratio transformer is used.

Output voltage near 0. Output current near 0.

limits specified in table B-2.

Readings within specified High

range limits (300 V/1 kHz).

*RST

CV annunciator on.

RMS Current Readback Accuracy

This test verifies the current readback. Use the appropriate current shunt with the accuracy specified in table B-1. Use wire of sufficient size to carry the maximum rated curent of the ac source (see table 2-1).

If you are verifying a 3-phase source, start by verifying phase 1.

Action Normal Result

1. Turn off the ac source. Connect the load resistor, current shunt, and the DVM across the current shunt as shown in Figure B-1. Use the following load resistor values: HP 6814B = 7.5Ω; HP 6834B = 15Ω; HP 6843A = 5Ω

2. Turn on the ac source. In the Output menu, execute the *RST command to reset the unit to its factory default state.

3. Program the output voltage to 100 volts and set the current limit as follows: HP 6814B = 10 A; HP 6834B = 5A; HP 6843A = 15A Then enable the output by pressing Output On/Off.

4. Record the DVM voltage reading and calculate the rms current. Divide the DVM reading by the current monitor resistor value. Record the front panel reading.

If you are verifying a 3-phase source, repeat steps 1 through 4 for phases 2 and 3. Press Phase Select to select the next phase.

CC annunciator on. Output current

near 10 A for HP 6814B

near 5 A for HP 6834B

near 15A for HP 6843A

Difference between the measured

output curent and front panel

readings are within specified limits.

*RST

B - Verification and Calibration

Table B-2. HP 6814B/6834B/6843A Verification Test Record

Model ________________ Report No.____________ Date_____________

Test Description Minimum

Specification

Voltage Programming and Measurement Accuracy

Low voltage (150 Vrms) Front Panel Measurement

High voltage (300 Vrms) Front Panel Measurement

HP 6814B Current Measurement Accuracy

Front Panel Measurement (10A)

HP 6834B Current Measurement Accuracy

Front Panel Measurement (5A)

HP 6843A Current Measurement Accuracy

Front Panel Measurement (15A)

149.5 V

Vout −300 mV

299.30 V

Vout −400 mV

Iout −60 mA

Iout −30 mA

Iout −65 mA

Performing the Calibration Procedure

Recorded Results Maximum

Specification

_______V

_______mV

_______V

_______mV

_______mA Iout +60 mA

_______mA Iout +30 mA

_______mA Iout +65 mA

150.5 V

Vout +300 mV

300.7 V

Vout +400 mV

Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup.

NOTE: You do not have to do a complete calibration each time. You may calibrate only the

voltage or current and proceed to "Saving the Calibration Constants." However, before you calibrate OVP, you must first calibrate the output voltage.

The following parameters may be calibrated:

♦ ac output voltage ♦ realtime voltage (HP 6843A only) ♦ overvoltage protection (OVP) ♦ output voltage readback ♦ ac output current ♦ output current measurement (HP6843A only) ♦ output impedance (HP6843A only)

Before calibrating the output impedance on HP 6843A units, you must first calibrate the output voltage and the output current.

NOTE: The HP 6834A ac source must be calibrated in 3-phase output mode or an error will

occur. To put the HP 6834B unit in 3-phase output mode, press Address, scroll to NOUTPUT 3 command, and press Enter.

Front Panel Calibration Menu

qpã

The Entry keypad is used for calibration functions.

Verification and Calibration - B

Shift Cal

Press this key to access the calibration menu.

Display Command Function

CAL ON <value> Turns calibration mode on when the correct password

value is entered.

CAL OFF Turns calibration mode off CAL:LEV <char> Advance to next step in sequence (P1, P2, P3, or P4). CAL:DATA <value> Input a calibration measurement.

CAL:VOLT:AC Begin ac voltage calibration sequence CAL:VOLT:PROT Begin voltage protection calibration CAL:CURR:AC Begin ac current calibration sequence CAL:CURR:MEAS Begin current measurement calibration sequence CAL:IMP Begin output impedance calibration sequence CAL:VOLT:RTIM CAL:SAVE Saves the calibration constants in non-volatile memory. CAL:PASS <value> Set new calibration password.

Notes:

HP 6843A only value = a numeric value char = a character string parameter Use and to scroll through the command list. Use and to scroll through the parameter list.

Begin realtime voltage calibration

Front Panel Calibration

WARNING LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH

The following procedures assume you understand how to operate front panel keys (see chapter 4).

Enable Calibration Mode

Action Display

1. Reset the unit by selecting Shift, Output, and pressing Enter.

If you are calibration a 3-phase source, make sure that the default phase 1 (φ1) annunciator is lit. Press Phase Select to select a different phase.

2. Press Shift Calibration, scroll to CAL ON, and press Enter. CAL ON 0.0

3. Enter the calibration password from Entry keypad and press Enter. lf the

password is correct the Cal annunciator will come on. If CAL DENIED appears, then an internal switch has been set to prevent

the calibration from being changed. (See the Service Manual.) lf the password is incorrect, an error occurs. If the active password is lost,

the calibration function can be recovered by setting an internal switch that defeats password protection. (See the Service Manual.)

*RST

CAL DENIED

OUT OF RANGE

B - Verification and Calibration

Calibrating and Entering Voltage Calibration Values

Action Display

4. Connect the DVM (ac volts mode) directly to the ac source via the ratio transformer shown in Figure B-1. Do not connect the load resistor or current shunt.

5. Press Shift Calibration, scroll to CAL VOLT AC, and press Enter. CAL:VOLT:AC

6. Press Shift Calibration, scroll to CAL LEV P1, and press Enter to select the first calibration point.

7. Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad to enter the voltage value displayed on the DVM. (Multiply the DVM readings by the transformer ratio if a ratio transformer is used.)

8. Press Shift Calibration, scroll to CAL LEV P1, use È to scroll to the P2 parameter, and press Enter. This selects the second calibration point.

9. Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad to enter the voltage value displayed on the DVM. (Multiply the DVM readings by the transformer ratio if a ratio transformer is used.)

10. Press Shift Calibration, scroll to CAL LEV P1, use È to scroll to the P3 parameter, and press Enter.

11. Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad to enter the voltage value displayed on the DVM. (Multiply the DVM readings by the transformer ratio if a ratio transformer is used.)

12. Press Shift Calibration, scroll to CAL LEV P1, use È to scroll to the P4 parameter, and press Enter.

13. Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad to enter the voltage value displayed on the DVM. (Multiply the DVM readings by the transformer ratio if a ratio transformer is used.)

The ac source is now holding the new voltage calibration constants in RAM

CAL:LEV P1

CAL:DATA 0.00

CAL:LEV P2

CAL:DATA 0.00

CAL:LEV P3

CAL:DATA 0.00

CAL:LEV P4

CAL:DATA 0.00

Calibrating and entering realtime voltage calibration values (HP 6843A only)

14. Press Shift Calibration, scroll to CAL VOLT RTIM, and press Enter. CAL:VOLT:RTIM

15. Press Shift Calibration, scroll to CAL LEV P1, and press Enter. CAL:LEV P1

16. Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad to enter the voltage value displayed on the DVM. (Multiply the DVM readings by the transformer ratio if a ratio transformer is used.)

Calibrating the OVP trip point

17. Press Shift Calibration, scroll to CAL VOLT PROT, and press Enter. CAL:VOLT:PROT

CAL:DATA 0.00

Verification and Calibration - B

18. Wait for the ac source to compute the OVP calibration constant. The display returns to Meter mode when the OVP calculation is complete.

The ac source is now holding the new OVP calibration constants in RAM

19.

If you are calibrating a 3-phase source, press Phase Select to select the next phase and repeat steps 4 through 13 and 17 and 18 for phases 2 and

3. The phase annunciators on the front panel indicate which phase is active.

Calibrating and Entering Current Calibration Values

Action Display

20. Connect the appropriate current shunt and load resistor as shown in figure B-1. Connect the DVM (ac rms mode) across the current shunt.

If you are calibrating a 3-phase source, make sure that the default phase 1 (φ1) annunciator is lit. Press Phase Select to select a different phase.

21. Press Shift Calibration, scroll to CAL CURR AC, and press Enter. CAL:CURR:AC

22. Press Shift Calibration, scroll to CAL LEV P1, and press Enter. CAL:LEV P1

23. Press Shift Calibration and scroll to CAL DATA. Wait for the DVM reading to stabilize. Read the DVM and calculate the first current value (DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad to enter the rms current value.

24. Press Shift Calibration, scroll to CAL LEV P1, use È to scroll to the P2 parameter, and press Enter.

25. Press Shift Calibration and scroll to CAL DATA. Wait for the DVM reading to stabilize. Read the DVM and calculate the second current value (DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad to enter the rms current value.

26.

If you are calibrating a 3-phase source, press Phase Select to select the next phase and repeat steps 20 through 25 for phases 2 and 3. The phase annunciators on the front panel indicate which phase is active.

Calibrating and entering rms current measurement values (HP 6843A only)

27. Press Shift Calibration, scroll to CAL CURR MEAS, and press Enter. CAL:CURR:MEAS

28. Press Shift Calibration, scroll to CAL LEV P1, and press Enter. CAL:LEV P1

29. Press Shift Calibration and scroll to CAL DATA. Wait for the DVM reading to stabilize. Read the DVM and calculate the first current value (DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad to enter the rms current value.

CAL:DATA 0.00

CAL:LEV P2

CAL:DATA 0.00

B - Verification and Calibration

30. Press Shift Calibration, scroll to CAL LEV P1 command, use È to scroll to the P2 parameter, and press Enter.

31. Press Shift Calibration and scroll to the CAL DATA. Wait for the DVM reading to stabilize.Read the DVM and calculate the second current value (DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad to enter the rms current value.

The ac source is now holding the new current calibration constants in RAM

CAL:LEV P2

CAL:DATA 0.00

Calibrating the Output Impedance (HP 6843A only)

NOTE: The output voltage and output current must be calibrated before the output impedance can

be calibrated.

Action Display

32. Connect only the output impedance resistor across the output of the ac source. Do not connect any other equipment.

33. Press Shift Calibration, scroll to the CAL IMP command, and press Enter. CAL:IMP

34. Wait for the ac source to compute the output impedance calibration constant. The display returns to Meter mode when the calculation is complete.

The ac source is now holding the new impedance calibration constants in RAM

Saving the Calibration Constants

CAUTION: Storing calibration constants overwrites the existing ones in non-volatile memory. If you

are not sure you want to permanently store the new constants, omit this step. The ac source calibration will then remain unchanged.

Action Display

35. Press Shift Calibration, scroll to CAL SAVE, and press Enter. CAL:SAVE

36. Press Shift Calibration, select CAL OFF, and press Enter to exit Calibration mode. *RST and *RCL will also set the calibration state to OFF.

CAL OFF

Verification and Calibration - B

Changing the Calibration Password

The factory default password is 0. You can change the password when the ac source is in calibration mode (which requires you to enter the existing password). Proceed as follows:

Action Display

1. Begin by pressing Shift Calibration and scrolling to the CAL ON command.

2. Enter the existing password from Entry keypad and press Enter

3. Press Shift Calibration and scroll to the CAL PASS command. CAL:PASS 0

4. Enter the new password from the keypad. You can use any number with up to six digits and an optional decimal point. If you want the calibration function to operate without requiring any password, change the password to 0 (zero).

NOTE: If you want the calibration function to operate without requiring any password, change the

password to 0 (zero).

CAL ON 0.0

Calibration Error Messages

Errors that can occur during calibration are shown in the following table.

Table B-3. HP-IB Calibration Error Messages

Error Meaning

401 CAL switch prevents calibration (This is a hardware disable, see the ac source Service

Manual.) 402 CAL password is incorrect 403 CAL not enabled 404 Computed readback cal constants are incorrect 405 Computed programming cal constants are incorrect 406 Incorrect sequence of calibration commands

Calibration Over the HP-IB

You can calibrate the ac source by using SCPI commands within your controller programming statements. Be sure you are familiar with calibration from the front panel before you calibrate from a controller. Each front panel calibration command has a corresponding SCPI command.

The SCPI calibration commands are explained in chapter 3 of the ac source Programming Guide. Calibration error messages that can occur during HP-IB calibration are shown in table B-3.

HP Calibration Program Listing

Figure B-2 lists the calibration program. This program can be run on any controller operating under HP BASIC. The assumed power supply address is 705 and calibration password is 0. If required, change these parameters in the appropriate statements.

B - Verification and Calibration

10 ! 20 ! AC Source calibration program Rev B.00.00 30 ! 40 ASSIGN @Ac TO 705 50 ! 60 PRINT TABXY(3,3),"This program will calibrate the 6814B/34B/43A AC Power Solutions." 70 PRINT TABXY(3,5),"Equipment requirements are: HP3458A or equivalent DVM" 80 PRINT TABXY(35,6),"0.01 ohm <200ppm Current Shunt for 6814B/6834B" 90 PRINT TABXY(35,7),"0.001 ohm <200ppm Current Shunt for 6843A" 100 PRINT TABXY(35,8),"0 - 5 ohm > 4.8 kW power resistor for 6843A" 110 PRINT TABXY(35,9),"2 - 15 ohm > 1.5 kW power resistor for 6814B/6834B" 120 PRINT TABXY(35,10),"1 - 1 ohm > 100 watt impedance resistor for 6843A" 130 PRINT TABXY(35,11),"30:1 <50ppm Ratio Transformer" 140 PRINT TABXY(3,13),"Ratio Transformer is required when calibrating to MIL-STD-45662A. If the ratio" 150 PRINT TABXY(3,14),"transformer is not used, the measurement uncertainty must be recalculated." 160 PRINT TABXY(3,16),"IF YOU ARE CALIBRATING A 6843B, SELECT THE PHASE TO CALIBRATE USING THE FRONT" 170 PRINT TABXY(3,17),"PANEL KEYPAD. *** NOTE: THIS PROGRAM WILL ONLY CALIBRATE 1 PHASE. ***" 180 PRINT TABXY(3,18),"YOU MUST RUN THIS PROGRAM 3 TIMES TO CALIBRATE ALL PHASES OF A 6843B." 190 DISP "Press CONT to continue" 200 PAUSE 210 CLEAR SCREEN 220 PRINT TABXY(10,5),"1. Turn the AC Source off" 230 PRINT TABXY(10,7),"2. Disconnect all loads" 240 PRINT TABXY(10,9),"3. Connect the 3458A to the rear terminal block" 250 PRINT TABXY(10,11),"4. Set the 3458A to AC VOLTS" 260 PRINT TABXY(10,13),"5. Turn on the AC Source" 270 ! 280 DISP "Press CONT to begin AC PROGRAMMING and MEASUREMENT calibration" 290 PAUSE 300 CLEAR SCREEN 310 PRINT TABXY(18,5),"CALIBRATING AC POGRAMMING and MEASUREMENT" 320 PRINT TABXY(20,7),"There are 4 points to be calibrated" 330 OUTPUT @Ac;"CAL:STATE:ON" 340 OUTPUT @Ac;"CAL:VOLT:AC" 350 OUTPUT @Ac;"CAL:LEV P1" 360 WAIT 10 370 INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p1 380 PRINT TABXY(25,9),"Point 1 entered" 390 OUTPUT @Ac;"CAL:DATA";Ac_p1 400 OUTPUT @Ac;"CAL:LEV P2" 410 WAIT 10 420 INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p2 430 PRINT TABXY(25,11),"Point 2 entered" 440 OUTPUT @Ac;"CAL:DATA";Ac_p2 450 OUTPUT @Ac;"CAL:LEV P3" 460 WAIT 10 470 INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p3 480 PRINT TABXY(25,13),"Point 3 entered" 490 OUTPUT @Ac;"CAL:DATA";Ac_p3 500 OUTPUT @Ac;"CAL:LEV P4" 510 WAIT 10 520 INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p4 530 PRINT TABXY(25,15),"Point 4 entered" 540 OUTPUT @Ac;"CAL:DATA";Ac_p4 550 WAIT 3 560 CLEAR SCREEN 570 ! 580 ! Only include lines 580 - 690 if calibrating HP 6843 590 ! 600 PRINT TABXY(18,5),"CALIBRATING REALTIME VOLTAGE (HP 6834A ONLY)" 610 PRINT TABXY(20,7),"There is 1 point to be calibrated" 620 OUTPUT @Ac;"CAL:VOLT:RTIM" 630 OUTPUT @Ac;"CAL:LEV P1" 640 WAIT 10 650 INPUT "Enter realtime rms ( transformer ratio * DVM reading)",Rt_p1 660 PRINT TABXY(25,9),"Point 1 entered" 670 OUTPUT @Ac;"CAL:DATA";Rt_p1 680 WAIT 3 690 CLEAR SCREEN

Figure B-2. Calibration Program Listing (Sheet 1 of 2)

Verification and Calibration - B

700 PRINT TABXY(15,10),"CALIBRATING OVERVOLTAGE PROTECTION" 710 OUTPUT @Ac;"CAL:VOLT:PROT" 720 PRINT TABXY(30,15),"WAIT" 730 WAIT 30 740 OUTPUT @Ac;"CAL:SAVE" 750 OUTPUT @Ac;"CAL:STATE OFF" 760 CLEAR SCREEN 770 PRINT TABXY(15,5),"1. Turn off the AC Source" 780 PRINT TABXY(15,7),"2. Connect the current shunt and load resistor, see fig.B-1" 790 PRINT TABXY(15,9),"3. Connect the 3458A across the current shunt" 800 PRINT TABXY(15,11),"4. Set the 3458A to AC rms VOLTS" 810 PRINT TABXY(15,13),"5. Turn on the AC Source" 820 ! 830 DISP "Press CONT to begin Current Program and Measurement calibration" 840 PAUSE 850 CLEAR SCREEN 860 PRINT TABXY(22,5),"CALIBRATING CURRENT POGRAMMING" 870 PRINT TABXY(20,7),"There are 2 points to be calibrated" 880 OUTPUT @Ac;"CAL:STATE ON" 890 OUTPUT @Ac;"CAL:CURR:AC" 900 OUTPUT @Ac;"CAL:LEV P1" 910 WAIT 10 920 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p1 930 PRINT TABXY(25,9),"Point 1 entered" 940 OUTPUT @Ac;"CAL:DATA";Ai_p1 950 OUTPUT @Ac;"CAL:LEV P2" 960 WAIT 10 970 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p2 980 PRINT TABXY(25,11),"Point 2 entered" 990 OUTPUT @Ac;"CAL:DATA";Ai_p2 1000 WAIT 3 1010 CLEAR SCREEN 1020 ! 1030 ! Only include lines 1030 - 1340 if calibrating HP 6843 1040 ! 1050 PRINT TABXY(22,5),"CALIBRATING CURRENT MEASUREMENT (HP 6843A ONLY)" 1060 PRINT TABXY(20,7),"There are 2 points to be calibrated" 1070 OUTPUT @Ac;"CAL:CURR:MEAS" 1080 OUTPUT @Ac;"CAL:LEV P1" 1090 WAIT 10 1100 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p1 1110 PRINT TABXY(25,9),"Point 1 entered" 1120 OUTPUT @Ac;"CAL:DATA";Am_p1 1130 OUTPUT @Ac;"CAL:LEV P2" 1140 WAIT 10 1150 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p2 1160 PRINT TABXY(25,11),"Point 2 entered" 1170 OUTPUT @Ac;"CAL:DATA";Am_p2 1180 WAIT 3 1190 CLEAR SCREEN 1200 OUTPUT @Ac;"CAL:SAVE" 1210 OUTPUT @Ac;"CAL:STATE OFF" 1220 PRINT TABXY(15,5),"1. Turn off the AC Source" 1230 PRINT TABXY(15,7),"2. Disconnect all equipment from the AC Source" 1240 PRINT TABXY(15,9),"3. Connect the 1 ohm impedance resistor, see fig.B-1" 1250 PRINT TABXY(15,11),"4. Turn on the AC Source" 1260 ! 1270 DISP "Press CONT to begin Output Impedance calibration" 1280 PAUSE 1290 PRINT TABXY(15,10),"CALIBRATING OUTPUT IMPEDANCE (HP 6843A ONLY)" 1300 OUTPUT @Ac;"CAL:STATE ON" 1310 OUTPUT @Ac;"CAL:IMP" 1320 PRINT TABXY(30,15),"WAIT" 1330 WAIT 30 1340 ! 1350 OUTPUT @Ac;"CAL:SAVE" 1360 OUTPUT @Ac;"CAL:STATE OFF" 1370 CLEAR SCREEN 1380 PRINT TABXY(25,10),"CALIBRATION COMPLETE" 1390 END

Figure B-2. Calibration Program Listing (Sheet 2 of 2)

Error Messages

Error Number List

This appendix gives the error numbers and descriptions that are returned by the ac source. Error numbers are returned in two ways:

♦ Error numbers are displayed on the front panel ♦ Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor?

returns the error number into a variable and returns two parameters: an NR1 and a string.

The following table lists the errors that are associated with SCPI syntax errors and interface problems. It also lists the device dependent errors. Information inside the brackets is not part of the standard error message, but is included for clarification. When errors occur, the Standard Event Status register records them in bit 2, 3, 4, or 5:

Table C-1. Error Numbers

Error Number Error String [Description/Explanation/Examples]

Command Errors –100 through –199 (sets Standard Event Status Register bit #5)

–100 Command error [generic] –101 Invalid character –102 Syntax error [unrecognized command or data type] –103 Invalid separator –104 Data type error [e.g., "numeric or string expected, got block data"] –105 GET not allowed –108 Parameter not allowed [too many parameters] –109 Missing parameter [too few parameters] –112 Program mnemonic too long [maximum 12 characters] –113 Undefined header [operation not allowed for this device] –121 Invalid character in number [includes "9" in octal data, etc.] –123 Numeric overflow [exponent too large; exponent magnitude >32 k] –124 Too many digits [number too long; more than 255 digits received] –128 Numeric data not allowed –131 Invalid suffix [unrecognized units, or units not appropriate] –138 Suffix not allowed

–141 Invalid character data [bad character, or unrecognized]

–144 Character data too long –148 Character data not allowed –150 String data error –151 Invalid string data [e.g., END received before close quote] –158 String data not allowed –160 Block data error –161 Invalid block data [e.g., END received before length satisfied] –168 Block data not allowed –170 Expression error

C - Error Messages

–171 Invalid expression –178 Expression data not allowed

Execution Errors –200 through –299 (sets Standard Event Status Register bit #4)

–200 Execution error [generic] –221 Settings conflict [check current device state] –222 Data out of range [e.g., too large for this device] –223 Too much data [out of memory; block, string, or expression too long] –224 Illegal parameter value [device-specific] –225 Out of memory –270 Macro error –272 Macro execution error –273 Illegal macro label –276 Macro recursion error –277 Macro redefinition not allowed

System Errors –300 through –399 (sets Standard Event Status Register bit #3)

–310 System error [generic] –350 Too many errors [errors beyond 9 lost due to queue overflow]

Query Errors –400 through –499 (sets Standard Event Status Register bit #2)

–400 Query error [generic] –410 Query INTERRUPTED [query followed by DAB or GET before response complete] –420 Query UNTERMINATED [addressed to talk, incomplete programming message received] –430 Query DEADLOCKED [too many queries in command string] –440 Query UNTERMINATED [after indefinite response]

Selftest Errors 0 through 99 (sets Standard Event Status Register bit #3)

0 No error 1 Non-volatile RAM RD0 section checksum failed 2 Non-volatile RAM CONFIG section checksum failed 3 Non-volatile RAM CAL section checksum failed 4 Non-volatile RAM WAVEFORM section checksum failed 5 Non-volatile RAM STATE section checksum failed 6 Non-volatile RAM LIST section checksum failed 7 Non-volatile RAM RST section checksum failed

10 RAM selftest

11 - 31 DAC selftest error, expected <n>, read <reading>

Errors 11, 12, 13, 14, 15 apply to DAC12 1A and 1B Errors 16, 17, 18 apply to DAC12 2A Errors 19, 20, 21 apply to DAC12 2B Errors 22, 23 apply to DAC12 4A Errors 24, 25 apply to DAC12 4B Errors 26, 27, 28 apply to DAC12 3A and 3B Errors 29, 30, 31 apply to DAC12 5A and 5B

40 Voltage selftest error, output 1

Error Messages - C

41 Voltage selftest error, output 2 42 Voltage selftest error, output 3 43 Current selftest error, output 1 44 Current selftest error, output 2 45 Current selftest error, output 3 70 Fan voltage failure 80 Digital I/O selftest error

Device-Dependent Errors 100 through 32767 (sets Standard Event Status Register bit #3)

200 Outgrd not responding 201 Front panel not responding 210 Ingrd receiver framing error 211 Ingrd uart overrun status 212 Ingrd received bad token 213 Ingrd receiver buffer overrun 214 Ingrd input buffer overrun 215 Outgrd output buffer overrun 216 RS-232 receiver framing error 217 RS-232 receiver parity error 218 RS-232 receiver overrun error 219 Ingrd inbuf count sync error 220 Front panel uart overrun 221 Front panel uart framing 222 Front panel uart parity 223 Front panel buffer overrun 224 Front panel timeout 401 CAL switch prevents calibration 402 CAL password is incorrect 403 CAL not enabled 404 Computed readback cal constants are incorrect 405 Computed programming cal constants are incorrect 406 Incorrect sequence of calibration commands 600 Systems in mode:list have different list lengths 601 Requested voltage and waveform exceeds peak voltage capability 602 Requested voltage and waveform exceeds transformer volt-second rating 603 Command only applies to RS-232 interface 604 Trigger received before requested number of pre-trigger readings 605 Requested RMS current too high for voltage range 606 Waveform data not defined 607 VOLT, VOLT:SLEW, and FUNC:SHAP modes incompatible 608 Measurement overrange 609 Output buffer overrun 610 Command cannot be given with present SYST:CONF setting

—A—

Index

error messages, 29 error numbers, 71

accessories, 10 airflow, 16 annunciators

φ1, 32 Addr, 32 Cal, 32 CC, 32 CV, 32 Dis, 32 Err, 32 OCP, 32 Prot, 32 Rmt, 32 Shift, 32 SRQ, 32 Tran, 32 Unr, 32

AWG ratings, 19

cables, 10 calibration, 62

enable, 63 equipment, 59 error messages, 67 menu, 63 output impedance, 66 password, 66 program listing, 67 rms current, 65 saving, 66 setup, 60

voltage offset, 64 capabilities, 11 cleaning, 15

damage, 15 digital connections, 21 digital connector, 15 dimensions, 16

—C—

—D—

—F—

features, 11 Fixed, 44 FLT connections, 21 frequency control, 12 front panel, 31

annuncuiators, 32 controls and indicators, 12, 31 keys, 32

function keys, 34

•, 34, 35

•Index, 34

immediate action, 34 Output On/Off, 34 Phase Select, 34 Trigger, 34

fuses, 17

—G—

general information, 9 ground, earth, 10 guide, programming, 9 guide, user’s, 9

—H—

hazardous voltages, 59 history, 6 HP-IB, 53

address, 53 connections, 22

—I—

INH connections, 21 input

connections, 17 power, 10

inspection, 15

—L—

entry keys, 40

Å, 40

0 ... 9, 40

Clear Entry, 40

E, 40

Enter, 40

—E—

lethal voltages, 59 line fuse

replacing, 29 List, 44, 46 load voltage drops, 19 location, 16

Index

—R—

—M—

manuals, 9, 15 Meter AC+DC, 32 meter display keys

Harmonic, 35 Input, 35 Meter, 35

—N—

non-volatile memory

clearing, 53 storing, 33

—O—

operating features, 11 options, 10 output

characteristic, 12 connections, 19 connector, 15 rating, 12 setting output protection, 43 setting the amplitude, 41, 54

setting the frequency, 43 Output AC+DC, 32 output checkout, 26 output control keys

Current, 36

Freq, 36

Voltage, 36 OVLD, 29

—P—

Peak Inrush current

measuring, 52 Phase synchronization, 47 power cord, 15

installation, 17 power receptacle, 10 preliminary checkout, 25 print date, 6 program listing

calibration, 67 protection/status keys

Protect, 38

Status, 38 Pulse, 45

rack mount kit, 10 rack mounting, 16 recalling operating states, 53 remote programming, 12 remote sensing, 20

OVP considerations, 21 repacking, 15 RS-232, 53

connections

interface commands, 23 data format, 23 handshake, 24 interface cable, 24 pinouts, 23

—S—

safety class, 10 safety summary, 3 safety warning, 10 saving operating states, 53 self-test, 25 selftest errors, 29 sense connections, 20 service guide, 10 shift annunciator, 26 shift key, 26 Slew rates

programming, 50

specifications, 55 Step, 44 supplemental characteristics, 56 SYSTem

LOCal, 23 REMote, 23 RWLock, 23

system errors, 71 system keys, 33

Address, 33 Error, 33 Interface, 33 Local, 33 RCL, 33 Save, 33 Shift, 33

—V—

Index

—T—

transient voltage

fixed, 44 list, 44, 46 pulse, 45

step, 44 transient voltage mode, 44 trigger connections, 21 Trigger delays, 47 trigger IN, 21 trigger OUT, 21 trigger/list keys

List, 39

Trigger Control, 39 turn-on checkout, 25, 60

verification, 26

ac measurement accuracy, 61 ac voltage programming, 61 equipment, 59 rms current accuracy, 61 setup, 60

test record, 62 verification tests, 25 voltage control, 12

—W—

warranty, 2 Waveform

generation, 50 wire

current ratings, 19 wiring considerations, 19

Agilent 6814B Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Warranty Information

Safety Summary

Declaration Page

Acoustic Noise Information

Printing History

Table of Contents

General Information

Document Orientation

Safety Considerations

Description

Front Panel/Remote Operation

Output Characteristic

Installation

Inspection

Location

Input Connections

Output Connections

Remote Sense Connections

Trigger Connections

Digital Connections

Controller Connections

Turn-On Checkout

Preliminary Checkout

Using the Keypad

Checkout Procedure

In Case of Trouble

Front panel Operation

Front Panel Description

System Keys

Function Keys

Entry Keys

Specifications

Supplemental Characteristics

Verification and Calibration

Performing the Verification Tests

Performing the Calibration Procedure

Front Panel Calibration

Changing the Calibration Password

Calibration Error Messages

Calibration Over the HP-IB

Error Messages

Index